wrapped C/C++ object of type QScreen has been deleted

[chimerax-bug-report@…]

The following bug report has been submitted:
Platform:        macOS-10.15.4-x86_64-i386-64bit
ChimeraX Version: 1.2.5 (2021-05-24 04:13:57 UTC)
Description
(Describe the actions that caused this problem to occur here)

Log:
> graphics silhouettes true

> lighting soft

UCSF ChimeraX version: 1.2.5 (2021-05-24)  
© 2016-2021 Regents of the University of California. All rights reserved.  
How to cite UCSF ChimeraX  

> open 7sb3

Summary of feedback from opening 7sb3 fetched from pdb  
---  
notes | Fetching compressed mmCIF 7sb3 from
http://files.rcsb.org/download/7sb3.cif  
Fetching CCD 8Z9 from http://ligand-expo.rcsb.org/reports/8/8Z9/8Z9.cif  
  
7sb3 title:  
Structure of OC43 spike in complex with polyclonal Fab1 (Donor 269) [more
info...]  
  
Chain information for 7sb3 #1  
---  
Chain | Description  
A B J | Spike protein  
H L | Human polyclonal Fab model with polyalanine backbone - Heavy chain  
  
Non-standard residues in 7sb3 #1  
---  
8Z9 — Sapienic acid  
BMA — beta-D-mannopyranose (beta-D-mannose; D-mannose; mannose)  
NAG — 2-acetamido-2-deoxy-beta-D-glucopyranose (N-acetyl-beta-D-glucosamine;
2-acetamido-2-deoxy-beta-D-glucose; 2-acetamido-2-deoxy-D-glucose;
2-acetamido-2-deoxy-glucose; N-ACETYL-D-GLUCOSAMINE)  
  

> hide atoms

> show cartoons

> ui tool show "Show Sequence Viewer"

> sequence chain /H

Alignment identifier is 1/H  

> sequence chain /L

Alignment identifier is 1/L  

> select /L:5-6

10 atoms, 9 bonds, 2 residues, 1 model selected  

> select /L:5-105

505 atoms, 504 bonds, 101 residues, 1 model selected  

> select clear

> select /L:4

5 atoms, 4 bonds, 1 residue, 1 model selected  

> select /L:4-105

510 atoms, 509 bonds, 102 residues, 1 model selected  

> select clear

> open 7sby

Summary of feedback from opening 7sby fetched from pdb  
---  
note | Fetching compressed mmCIF 7sby from
http://files.rcsb.org/download/7sby.cif  
  
7sby title:  
Structure of OC43 spike in complex with polyclonal Fab7 (Donor 269) [more
info...]  
  
Chain information for 7sby #2  
---  
Chain | Description  
A B J | Spike protein  
H L | Human polyclonal Fab model with polyalanine backbone - Heavy chain  
  
Non-standard residues in 7sby #2  
---  
8Z9 — Sapienic acid  
BMA — beta-D-mannopyranose (beta-D-mannose; D-mannose; mannose)  
NAG — 2-acetamido-2-deoxy-beta-D-glucopyranose (N-acetyl-beta-D-glucosamine;
2-acetamido-2-deoxy-beta-D-glucose; 2-acetamido-2-deoxy-D-glucose;
2-acetamido-2-deoxy-glucose; N-ACETYL-D-GLUCOSAMINE)  
  

> hide #!1 models

> hide #!2 atoms

> show #!2 cartoons

> ui tool show "Show Sequence Viewer"

> sequence chain #2/H

Alignment identifier is 2/H  

> sequence chain #2/L

Alignment identifier is 2/L  

> hide #!2 models

> show #!1 models

> show #!2 models

> hide #!1 models

> hide #!2 models

> open 7l87

Summary of feedback from opening 7l87 fetched from pdb  
---  
note | Fetching compressed mmCIF 7l87 from
http://files.rcsb.org/download/7l87.cif  
  
7l87 title:  
BG505 SOSIP MD39 in complex with the polyclonal Fab pAbC-2 from animal
Rh.32034 (Wk26 time point) [more info...]  
  
Chain information for 7l87 #3  
---  
Chain | Description  
A C D | BG505 SOSIP MD39 - gp120  
B E F | BG505 SOSIP MD39 - gp41  
H | Rh.32034 pAbC-2 - Heavy Chain  
L | Rh.32034 pAbC-2 - Light Chain  
  
Non-standard residues in 7l87 #3  
---  
BMA — beta-D-mannopyranose (beta-D-mannose; D-mannose; mannose)  
MAN — alpha-D-mannopyranose (alpha-D-mannose; D-mannose; mannose)  
NAG — 2-acetamido-2-deoxy-beta-D-glucopyranose (N-acetyl-beta-D-glucosamine;
2-acetamido-2-deoxy-beta-D-glucose; 2-acetamido-2-deoxy-D-glucose;
2-acetamido-2-deoxy-glucose; N-ACETYL-D-GLUCOSAMINE)  
  

> hide #!3 atoms

> show #!3 cartoons

> ui tool show "Show Sequence Viewer"

> sequence chain #3/H

Alignment identifier is 3/H  

> sequence chain #3/L

Alignment identifier is 3/L  

> open /Users/hperrett/Desktop/3DSort_C1__it050_class001.mrc

Opened 3DSort_C1__it050_class001.mrc as #4, grid size 150,150,150, pixel 2.06,
shown at level 0.0229, step 1, values float32  

> hide #!3 models

> volume #4 level 0.01845

> volume #4 level 0.01381

> open 5cor

Summary of feedback from opening 5cor fetched from pdb  
---  
notes | Fetching compressed mmCIF 5cor from
http://files.rcsb.org/download/5cor.cif  
Fetching CCD HEZ from http://ligand-expo.rcsb.org/reports/H/HEZ/HEZ.cif  
Fetching CCD ACT from http://ligand-expo.rcsb.org/reports/A/ACT/ACT.cif  
  
5cor title:  
X-ray structure of macrophage inflammatory protein-1 α (CCL3) N-terminal-
switch polymer [more info...]  
  
Chain information for 5cor #5  
---  
Chain | Description  
A B C D E F G H I J | C-C motif chemokine 3  
  
Non-standard residues in 5cor #5  
---  
ACT — acetate ion  
HEZ — hexane-1,6-diol  
  
5cor mmCIF Assemblies  
---  
1| author_defined_assembly  
2| author_defined_assembly  
  

> hide #!4 models

> hide #5 atoms

> show #5 cartoons

> open 5c0r

Summary of feedback from opening 5c0r fetched from pdb  
---  
note | Fetching compressed mmCIF 5c0r from
http://files.rcsb.org/download/5c0r.cif  
  
5c0r title:  
Crystal Structure of a Generation 3 Influenza Hemagglutinin Stabilized Stem
Complexed with the Broadly Neutralizing Antibody C179 [more info...]  
  
Chain information for 5c0r #6  
---  
Chain | Description  
A | Hemagglutinin, Envelope glycoprotein, Fibritin fusion protein  
H | C179 Fab heavy chain  
L | C179 Fab light chain  
  
Non-standard residues in 5c0r #6  
---  
NAG — 2-acetamido-2-deoxy-beta-D-glucopyranose  
  
5c0r mmCIF Assemblies  
---  
1| author_and_software_defined_assembly  
  

> close #5#1-4,6

Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/alignment.py", line 635, in _mmap_mod_cb  
self.disassociate(self._sseq_to_chain[match_map.struct_seq], demotion=True)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/alignment.py", line 392, in disassociate  
self.session.alignments.destroy_alignment(self)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/manager.py", line 108, in destroy_alignment  
alignment._destroy()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/alignment.py", line 603, in _destroy  
self._notify_observers(self.NOTE_DESTROYED, None)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/alignment.py", line 652, in _notify_observers  
recipient.alignment_notification(note_name, note_data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seq-view/tool.py", line 474, in alignment_notification  
self.delete()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seq-view/tool.py", line 512, in delete  
ToolInstance.delete(self)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/tools.py", line 154, in delete  
self.session.ui.remove_tool(self)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/gui.py", line 345, in remove_tool  
self.main_window.remove_tool(tool_instance)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/gui.py", line 725, in remove_tool  
tw._destroy()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/gui.py", line 2049, in _destroy  
self.__toolkit.destroy()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/gui.py", line 2189, in destroy  
sbar.destroy()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/statusbar.py", line 51, in destroy  
v.delete()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 438, in delete  
self.make_current()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 478, in make_current  
return self._opengl_context.make_current()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 99, in make_current  
qc = self._initialize_context()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 125, in _initialize_context  
qc.setScreen(self._screen)  
RuntimeError: wrapped C/C++ object of type QScreen has been deleted  
  
Error processing trigger "modified":  
RuntimeError: wrapped C/C++ object of type QScreen has been deleted  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 125, in _initialize_context  
qc.setScreen(self._screen)  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/alignment.py", line 635, in _mmap_mod_cb  
self.disassociate(self._sseq_to_chain[match_map.struct_seq], demotion=True)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/alignment.py", line 392, in disassociate  
self.session.alignments.destroy_alignment(self)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/manager.py", line 108, in destroy_alignment  
alignment._destroy()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/alignment.py", line 603, in _destroy  
self._notify_observers(self.NOTE_DESTROYED, None)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/alignment.py", line 652, in _notify_observers  
recipient.alignment_notification(note_name, note_data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seq-view/tool.py", line 474, in alignment_notification  
self.delete()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seq-view/tool.py", line 512, in delete  
ToolInstance.delete(self)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/tools.py", line 154, in delete  
self.session.ui.remove_tool(self)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/gui.py", line 345, in remove_tool  
self.main_window.remove_tool(tool_instance)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/gui.py", line 725, in remove_tool  
tw._destroy()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/gui.py", line 2049, in _destroy  
self.__toolkit.destroy()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/gui.py", line 2189, in destroy  
sbar.destroy()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/statusbar.py", line 51, in destroy  
v.delete()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 438, in delete  
self.make_current()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 478, in make_current  
return self._opengl_context.make_current()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 99, in make_current  
qc = self._initialize_context()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 125, in _initialize_context  
qc.setScreen(self._screen)  
RuntimeError: wrapped C/C++ object of type QScreen has been deleted  
  
Error processing trigger "modified":  
RuntimeError: wrapped C/C++ object of type QScreen has been deleted  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 125, in _initialize_context  
qc.setScreen(self._screen)  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/alignment.py", line 635, in _mmap_mod_cb  
self.disassociate(self._sseq_to_chain[match_map.struct_seq], demotion=True)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/alignment.py", line 392, in disassociate  
self.session.alignments.destroy_alignment(self)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/manager.py", line 108, in destroy_alignment  
alignment._destroy()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/alignment.py", line 603, in _destroy  
self._notify_observers(self.NOTE_DESTROYED, None)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/alignment.py", line 652, in _notify_observers  
recipient.alignment_notification(note_name, note_data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seq-view/tool.py", line 474, in alignment_notification  
self.delete()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seq-view/tool.py", line 512, in delete  
ToolInstance.delete(self)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/tools.py", line 154, in delete  
self.session.ui.remove_tool(self)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/gui.py", line 345, in remove_tool  
self.main_window.remove_tool(tool_instance)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/gui.py", line 725, in remove_tool  
tw._destroy()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/gui.py", line 2049, in _destroy  
self.__toolkit.destroy()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/gui.py", line 2189, in destroy  
sbar.destroy()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/statusbar.py", line 51, in destroy  
v.delete()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 438, in delete  
self.make_current()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 478, in make_current  
return self._opengl_context.make_current()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 99, in make_current  
qc = self._initialize_context()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 125, in _initialize_context  
qc.setScreen(self._screen)  
RuntimeError: wrapped C/C++ object of type QScreen has been deleted  
  
Error processing trigger "modified":  
RuntimeError: wrapped C/C++ object of type QScreen has been deleted  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 125, in _initialize_context  
qc.setScreen(self._screen)  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/alignment.py", line 635, in _mmap_mod_cb  
self.disassociate(self._sseq_to_chain[match_map.struct_seq], demotion=True)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/alignment.py", line 392, in disassociate  
self.session.alignments.destroy_alignment(self)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/manager.py", line 108, in destroy_alignment  
alignment._destroy()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/alignment.py", line 603, in _destroy  
self._notify_observers(self.NOTE_DESTROYED, None)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/alignment.py", line 652, in _notify_observers  
recipient.alignment_notification(note_name, note_data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seq-view/tool.py", line 474, in alignment_notification  
self.delete()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seq-view/tool.py", line 512, in delete  
ToolInstance.delete(self)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/tools.py", line 154, in delete  
self.session.ui.remove_tool(self)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/gui.py", line 345, in remove_tool  
self.main_window.remove_tool(tool_instance)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/gui.py", line 725, in remove_tool  
tw._destroy()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/gui.py", line 2049, in _destroy  
self.__toolkit.destroy()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/gui.py", line 2189, in destroy  
sbar.destroy()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/statusbar.py", line 51, in destroy  
v.delete()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 438, in delete  
self.make_current()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 478, in make_current  
return self._opengl_context.make_current()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 99, in make_current  
qc = self._initialize_context()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 125, in _initialize_context  
qc.setScreen(self._screen)  
RuntimeError: wrapped C/C++ object of type QScreen has been deleted  
  
Error processing trigger "modified":  
RuntimeError: wrapped C/C++ object of type QScreen has been deleted  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 125, in _initialize_context  
qc.setScreen(self._screen)  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/alignment.py", line 635, in _mmap_mod_cb  
self.disassociate(self._sseq_to_chain[match_map.struct_seq], demotion=True)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/alignment.py", line 392, in disassociate  
self.session.alignments.destroy_alignment(self)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/manager.py", line 108, in destroy_alignment  
alignment._destroy()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/alignment.py", line 603, in _destroy  
self._notify_observers(self.NOTE_DESTROYED, None)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/alignment.py", line 652, in _notify_observers  
recipient.alignment_notification(note_name, note_data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seq-view/tool.py", line 474, in alignment_notification  
self.delete()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seq-view/tool.py", line 512, in delete  
ToolInstance.delete(self)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/tools.py", line 154, in delete  
self.session.ui.remove_tool(self)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/gui.py", line 345, in remove_tool  
self.main_window.remove_tool(tool_instance)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/gui.py", line 725, in remove_tool  
tw._destroy()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/gui.py", line 2049, in _destroy  
self.__toolkit.destroy()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/gui.py", line 2189, in destroy  
sbar.destroy()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/statusbar.py", line 51, in destroy  
v.delete()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 438, in delete  
self.make_current()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 478, in make_current  
return self._opengl_context.make_current()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 99, in make_current  
qc = self._initialize_context()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 125, in _initialize_context  
qc.setScreen(self._screen)  
RuntimeError: wrapped C/C++ object of type QScreen has been deleted  
  
Error processing trigger "modified":  
RuntimeError: wrapped C/C++ object of type QScreen has been deleted  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 125, in _initialize_context  
qc.setScreen(self._screen)  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/alignment.py", line 635, in _mmap_mod_cb  
self.disassociate(self._sseq_to_chain[match_map.struct_seq], demotion=True)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/alignment.py", line 392, in disassociate  
self.session.alignments.destroy_alignment(self)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/manager.py", line 108, in destroy_alignment  
alignment._destroy()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/alignment.py", line 603, in _destroy  
self._notify_observers(self.NOTE_DESTROYED, None)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seqalign/alignment.py", line 652, in _notify_observers  
recipient.alignment_notification(note_name, note_data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seq-view/tool.py", line 474, in alignment_notification  
self.delete()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/seq-view/tool.py", line 512, in delete  
ToolInstance.delete(self)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/tools.py", line 154, in delete  
self.session.ui.remove_tool(self)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/gui.py", line 345, in remove_tool  
self.main_window.remove_tool(tool_instance)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/gui.py", line 725, in remove_tool  
tw._destroy()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/gui.py", line 2049, in _destroy  
self.__toolkit.destroy()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/gui.py", line 2189, in destroy  
sbar.destroy()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/ui/statusbar.py", line 51, in destroy  
v.delete()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 438, in delete  
self.make_current()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 478, in make_current  
return self._opengl_context.make_current()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 99, in make_current  
qc = self._initialize_context()  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 125, in _initialize_context  
qc.setScreen(self._screen)  
RuntimeError: wrapped C/C++ object of type QScreen has been deleted  
  
Error processing trigger "modified":  
RuntimeError: wrapped C/C++ object of type QScreen has been deleted  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/graphics/opengl.py", line 125, in _initialize_context  
qc.setScreen(self._screen)  
  
See log for complete Python traceback.  
  

> open "/Users/hperrett/Dropbox (Scripps Research)/Ward
> Lab/Manuscripts/Philip/LASV EMPEM/Maps and models for
> submission/monomer_interior/cryosparc_P330_J1300_002_volume_mask_refine.mrc"
> format mrc

No such file/path: /Users/hperrett/Dropbox (Scripps Research)/Ward
Lab/Manuscripts/Philip/LASV EMPEM/Maps and models for
submission/monomer_interior/cryosparc_P330_J1300_002_volume_mask_refine.mrc  

> open "/Users/hperrett/Dropbox (Scripps Research)/Ward
> Lab/Subgroups/Influenza/Flu
> collaborations/ShAbs/Maps/Y5_w_headless_PLC21-07HA_cryosparc_P351_J291_005_volume_map_sharp.mrc"

Opened Y5_w_headless_PLC21-07HA_cryosparc_P351_J291_005_volume_map_sharp.mrc
as #1, grid size 360,360,360, pixel 0.725, shown at level 0.0111, step 2,
values float32  

> open "/Users/hperrett/Dropbox (Scripps Research)/Ward
> Lab/Subgroups/Influenza/Flu
> collaborations/ShAbs/Maps/Y5_headless_HA_trimercryosparc_P351_J282_006_volume_map_sharp.mrc"

Opened Y5_headless_HA_trimercryosparc_P351_J282_006_volume_map_sharp.mrc as
#2, grid size 210,210,210, pixel 1.45, shown at level 0.0285, step 1, values
float32  

> open "/Users/hperrett/Dropbox (Scripps Research)/Ward
> Lab/Subgroups/Influenza/Flu
> collaborations/ShAbs/initial_models/headless_ha.pdb"

headless_ha.pdb title:  
SWISS-MODEL SERVER (https://swissmodel.expasy.org) Untitled Project [more
info...]  
  
Chain information for headless_ha.pdb #3  
---  
Chain | Description  
A | No description available  
  

> open "/Users/hperrett/Dropbox (Scripps Research)/Ward
> Lab/Subgroups/Influenza/Flu
> collaborations/ShAbs/initial_models/swiss_model_Y5_vnar.pdb"

swiss_model_Y5_vnar.pdb title:  
SWISS-MODEL SERVER (https://swissmodel.expasy.org) Untitled Project [more
info...]  
  
Chain information for swiss_model_Y5_vnar.pdb #4  
---  
Chain | Description  
A | No description available  
  

> hide #!2 models

> volume #1 level 0.04977

> volume #1 level 0.07941

> select #3

1766 atoms, 1799 bonds, 227 residues, 1 model selected  

> ui mousemode right "translate selected models"

Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  

> view matrix models #3,1,0,0,133.9,0,1,0,39.563,0,0,1,152.02

Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/alignment_headers/rmsd.py", line 199, in _atomic_changes_cb  
if chain.structure in changes.modified_structures():  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 57, in _getattr_  
return look_in_class._attr_registration.get_attr(attr_name)  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
Error processing trigger "changes":  
AttributeError: 'Sequence' object has no attribute 'structure'  
  
File
"/Applications/ChimeraX-1.2.5.app/Contents/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-
packages/chimerax/core/attributes.py", line 85, in get_attr  
raise AttributeError("'%s' object has no attribute '%s'" %
(self.class_.__name__, attr_name)) from None  
  
See log for complete Python traceback.  
  




OpenGL version: 4.1 INTEL-14.5.22
OpenGL renderer: Intel(R) Iris(TM) Plus Graphics OpenGL Engine
OpenGL vendor: Intel Inc.Hardware:

    Hardware Overview:

      Model Name: MacBook Pro
      Model Identifier: MacBookPro16,2
      Processor Name: Quad-Core Intel Core i5
      Processor Speed: 2 GHz
      Number of Processors: 1
      Total Number of Cores: 4
      L2 Cache (per Core): 512 KB
      L3 Cache: 6 MB
      Hyper-Threading Technology: Enabled
      Memory: 16 GB
      Boot ROM Version: 1037.107.7.0.0 (iBridge: 17.16.14538.0.0,0)

Software:

    System Software Overview:

      System Version: macOS 10.15.4 (19E2269)
      Kernel Version: Darwin 19.4.0
      Time since boot: 6 days 4:57

Graphics/Displays:

    Intel Iris Plus Graphics:

      Chipset Model: Intel Iris Plus Graphics
      Type: GPU
      Bus: Built-In
      VRAM (Dynamic, Max): 1536 MB
      Vendor: Intel
      Device ID: 0x8a53
      Revision ID: 0x0007
      Metal: Supported, feature set macOS GPUFamily2 v1
      Displays:
        Color LCD:
          Display Type: Built-In Retina LCD
          Resolution: 2560 x 1600 Retina
          Framebuffer Depth: 30-Bit Color (ARGB2101010)
          Main Display: Yes
          Mirror: Off
          Online: Yes
          Automatically Adjust Brightness: No
          Connection Type: Internal
        LG UltraFine:
          Resolution: 3840 x 2160 (2160p/4K UHD 1 - Ultra High Definition)
          UI Looks like: 1920 x 1080 @ 30 Hz
          Framebuffer Depth: 30-Bit Color (ARGB2101010)
          Display Serial Number: 909NTYTGX050
          Mirror: Off
          Online: Yes
          Rotation: Supported
          Automatically Adjust Brightness: No
          Connection Type: Thunderbolt/DisplayPort

Locale: (None, 'UTF-8')
PyQt5 5.15.2, Qt 5.15.2
Installed Packages:
    alabaster: 0.7.12
    appdirs: 1.4.4
    appnope: 0.1.2
    Babel: 2.9.1
    backcall: 0.2.0
    blockdiag: 2.0.1
    certifi: 2020.12.5
    cftime: 1.5.0
    chardet: 3.0.4
    ChimeraX-AddCharge: 1.0.1
    ChimeraX-AddH: 2.1.6
    ChimeraX-AlignmentAlgorithms: 2.0
    ChimeraX-AlignmentHdrs: 3.2
    ChimeraX-AlignmentMatrices: 2.0
    ChimeraX-Alignments: 2.1
    ChimeraX-AmberInfo: 1.0
    ChimeraX-Arrays: 1.0
    ChimeraX-Atomic: 1.13.2
    ChimeraX-AtomicLibrary: 3.1.3
    ChimeraX-AtomSearch: 2.0
    ChimeraX-AtomSearchLibrary: 1.0
    ChimeraX-AxesPlanes: 2.0
    ChimeraX-BasicActions: 1.1
    ChimeraX-BILD: 1.0
    ChimeraX-BlastProtein: 1.1
    ChimeraX-BondRot: 2.0
    ChimeraX-BugReporter: 1.0
    ChimeraX-BuildStructure: 2.5.2
    ChimeraX-Bumps: 1.0
    ChimeraX-BundleBuilder: 1.1
    ChimeraX-ButtonPanel: 1.0
    ChimeraX-CageBuilder: 1.0
    ChimeraX-CellPack: 1.0
    ChimeraX-Centroids: 1.1
    ChimeraX-ChemGroup: 2.0
    ChimeraX-Clashes: 2.1
    ChimeraX-ColorActions: 1.0
    ChimeraX-ColorGlobe: 1.0
    ChimeraX-ColorKey: 1.2.1
    ChimeraX-CommandLine: 1.1.4
    ChimeraX-ConnectStructure: 2.0
    ChimeraX-Contacts: 1.0
    ChimeraX-Core: 1.2.5
    ChimeraX-CoreFormats: 1.0
    ChimeraX-coulombic: 1.1.1
    ChimeraX-Crosslinks: 1.0
    ChimeraX-Crystal: 1.0
    ChimeraX-CrystalContacts: 1.0
    ChimeraX-DataFormats: 1.1
    ChimeraX-Dicom: 1.0
    ChimeraX-DistMonitor: 1.1.3
    ChimeraX-DistUI: 1.0
    ChimeraX-Dssp: 2.0
    ChimeraX-EMDB-SFF: 1.0
    ChimeraX-ExperimentalCommands: 1.0
    ChimeraX-FileHistory: 1.0
    ChimeraX-FunctionKey: 1.0
    ChimeraX-Geometry: 1.1
    ChimeraX-gltf: 1.0
    ChimeraX-Graphics: 1.0
    ChimeraX-Hbonds: 2.1
    ChimeraX-Help: 1.1
    ChimeraX-HKCage: 1.3
    ChimeraX-IHM: 1.0
    ChimeraX-ImageFormats: 1.1
    ChimeraX-IMOD: 1.0
    ChimeraX-IO: 1.0.1
    ChimeraX-Label: 1.0
    ChimeraX-ListInfo: 1.1.1
    ChimeraX-Log: 1.1.2
    ChimeraX-LookingGlass: 1.1
    ChimeraX-Maestro: 1.8.1
    ChimeraX-Map: 1.0.2
    ChimeraX-MapData: 2.0
    ChimeraX-MapEraser: 1.0
    ChimeraX-MapFilter: 2.0
    ChimeraX-MapFit: 2.0
    ChimeraX-MapSeries: 2.0
    ChimeraX-Markers: 1.0
    ChimeraX-Mask: 1.0
    ChimeraX-MatchMaker: 1.2.1
    ChimeraX-MDcrds: 2.2
    ChimeraX-MedicalToolbar: 1.0.1
    ChimeraX-Meeting: 1.0
    ChimeraX-MLP: 1.1
    ChimeraX-mmCIF: 2.3
    ChimeraX-MMTF: 2.1
    ChimeraX-Modeller: 1.0.1
    ChimeraX-ModelPanel: 1.0.1
    ChimeraX-ModelSeries: 1.0
    ChimeraX-Mol2: 2.0
    ChimeraX-Morph: 1.0
    ChimeraX-MouseModes: 1.1
    ChimeraX-Movie: 1.0
    ChimeraX-Neuron: 1.0
    ChimeraX-Nucleotides: 2.0.1
    ChimeraX-OpenCommand: 1.5
    ChimeraX-PDB: 2.4.1
    ChimeraX-PDBBio: 1.0
    ChimeraX-PDBLibrary: 1.0.1
    ChimeraX-PDBMatrices: 1.0
    ChimeraX-PickBlobs: 1.0
    ChimeraX-Positions: 1.0
    ChimeraX-PresetMgr: 1.0.1
    ChimeraX-PubChem: 2.0.1
    ChimeraX-ReadPbonds: 1.0
    ChimeraX-Registration: 1.1
    ChimeraX-RemoteControl: 1.0
    ChimeraX-ResidueFit: 1.0
    ChimeraX-RestServer: 1.1
    ChimeraX-RNALayout: 1.0
    ChimeraX-RotamerLibMgr: 2.0
    ChimeraX-RotamerLibsDunbrack: 2.0
    ChimeraX-RotamerLibsDynameomics: 2.0
    ChimeraX-RotamerLibsRichardson: 2.0
    ChimeraX-SaveCommand: 1.4
    ChimeraX-SchemeMgr: 1.0
    ChimeraX-SDF: 2.0
    ChimeraX-Segger: 1.0
    ChimeraX-Segment: 1.0
    ChimeraX-SeqView: 2.3
    ChimeraX-Shape: 1.0.1
    ChimeraX-Shell: 1.0
    ChimeraX-Shortcuts: 1.0
    ChimeraX-ShowAttr: 1.0
    ChimeraX-ShowSequences: 1.0
    ChimeraX-SideView: 1.0
    ChimeraX-Smiles: 2.0.1
    ChimeraX-SmoothLines: 1.0
    ChimeraX-SpaceNavigator: 1.0
    ChimeraX-StdCommands: 1.3.1
    ChimeraX-STL: 1.0
    ChimeraX-Storm: 1.0
    ChimeraX-Struts: 1.0
    ChimeraX-Surface: 1.0
    ChimeraX-SwapAA: 2.0
    ChimeraX-SwapRes: 2.1
    ChimeraX-TapeMeasure: 1.0
    ChimeraX-Test: 1.0
    ChimeraX-Toolbar: 1.0.1
    ChimeraX-ToolshedUtils: 1.2
    ChimeraX-Tug: 1.0
    ChimeraX-UI: 1.7.6
    ChimeraX-uniprot: 2.1
    ChimeraX-UnitCell: 1.0
    ChimeraX-ViewDockX: 1.0
    ChimeraX-Vive: 1.1
    ChimeraX-VolumeMenu: 1.0
    ChimeraX-VTK: 1.0
    ChimeraX-WavefrontOBJ: 1.0
    ChimeraX-WebCam: 1.0
    ChimeraX-WebServices: 1.0
    ChimeraX-Zone: 1.0
    colorama: 0.4.3
    comtypes: 1.1.7
    cxservices: 1.0
    cycler: 0.10.0
    Cython: 0.29.21
    decorator: 5.0.9
    distlib: 0.3.1
    docutils: 0.16
    filelock: 3.0.12
    funcparserlib: 0.3.6
    grako: 3.16.5
    h5py: 2.10.0
    html2text: 2020.1.16
    idna: 2.10
    ihm: 0.17
    imagecodecs: 2020.5.30
    imagesize: 1.2.0
    ipykernel: 5.3.4
    ipython: 7.18.1
    ipython-genutils: 0.2.0
    jedi: 0.17.2
    Jinja2: 2.11.2
    jupyter-client: 6.1.7
    jupyter-core: 4.7.1
    kiwisolver: 1.3.1
    line-profiler: 2.1.2
    lxml: 4.6.2
    lz4: 3.1.0
    MarkupSafe: 2.0.1
    matplotlib: 3.3.2
    matplotlib-inline: 0.1.2
    msgpack: 1.0.0
    netCDF4: 1.5.4
    networkx: 2.5
    numexpr: 2.7.3
    numpy: 1.19.2
    numpydoc: 1.1.0
    openvr: 1.14.1501
    packaging: 20.9
    ParmEd: 3.2.0
    parso: 0.7.1
    pexpect: 4.8.0
    pickleshare: 0.7.5
    Pillow: 7.2.0
    pip: 21.0.1
    pkginfo: 1.5.0.1
    prompt-toolkit: 3.0.18
    psutil: 5.7.2
    ptyprocess: 0.7.0
    pycollada: 0.7.1
    pydicom: 2.0.0
    Pygments: 2.7.1
    PyOpenGL: 3.1.5
    PyOpenGL-accelerate: 3.1.5
    pyparsing: 2.4.7
    PyQt5-commercial: 5.15.2
    PyQt5-sip: 12.8.1
    PyQtWebEngine-commercial: 5.15.2
    python-dateutil: 2.8.1
    pytz: 2021.1
    pyzmq: 22.0.3
    qtconsole: 4.7.7
    QtPy: 1.9.0
    RandomWords: 0.3.0
    requests: 2.24.0
    scipy: 1.5.2
    setuptools: 50.3.2
    sfftk-rw: 0.6.7.dev1
    six: 1.15.0
    snowballstemmer: 2.1.0
    sortedcontainers: 2.2.2
    Sphinx: 3.2.1
    sphinxcontrib-applehelp: 1.0.2
    sphinxcontrib-blockdiag: 2.0.0
    sphinxcontrib-devhelp: 1.0.2
    sphinxcontrib-htmlhelp: 2.0.0
    sphinxcontrib-jsmath: 1.0.1
    sphinxcontrib-qthelp: 1.0.3
    sphinxcontrib-serializinghtml: 1.1.5
    suds-jurko: 0.6
    tables: 3.6.1
    tifffile: 2020.9.3
    tinyarray: 1.2.3
    tornado: 6.1
    traitlets: 5.0.5
    urllib3: 1.25.11
    wcwidth: 0.2.5
    webcolors: 1.11.1
    wheel: 0.36.0
    wheel-filename: 1.3.0