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

[chimerax-bug-report@…]

The following bug report has been submitted:
Platform:        Darwin-19.6.0-x86_64-i386-64bit
ChimeraX Version: 1.1.1 (2020-10-07 08:32:49 UTC)
Description
(Describe the actions that caused this problem to occur here)

Log:
UCSF ChimeraX version: 1.1.1 (2020-10-07)  
© 2016-2020 Regents of the University of California. All rights reserved.  
How to cite UCSF ChimeraX  

> open /Users/mnky/Downloads/final.casp.pdb format pdb

Chain information for final.casp.pdb #1  
---  
Chain | Description  
| No description available  
  

> open 6NTW

6ntw title:  
Crystal structure of E. coli YcbB [more info...]  
  
Chain information for 6ntw #2  
---  
Chain | Description  
A | Probable L,D-transpeptidase YcbB  
  
Non-standard residues in 6ntw #2  
---  
MXR —
(2S,3R,4S)-4-{[(3S,5R)-5-(dimethylcarbamoyl)pyrrolidin-3-yl]sulfanyl}-2-[(2S,3R)-3-hydroxy-1-oxobutan-2-yl]-3-methyl-3,4-dihydro-2H-pyrrole-5-carboxylic
acid (meropenem bound form (tautomerism))  
SO4 — sulfate ion  
  

> ui tool show Matchmaker

> matchmaker #1 to #2 alg Smith-Waterman matrix BLOSUM-65 showAlignment true

Parameters  
---  
Chain pairing | bb  
Alignment algorithm | Smith-Waterman  
Similarity matrix | BLOSUM-65  
SS fraction | 0.3  
Gap open (HH/SS/other) | 18/18/6  
Gap extend | 1  
SS matrix |  |  | H | S | O  
---|---|---|---  
H | 6 | -9 | -6  
S |  | 6 | -6  
O |  |  | 4  
Iteration cutoff | 2  
  
Matchmaker 6ntw (#2) with final.casp.pdb (#1), sequence alignment score = 35  
Alignment identifier is 1  
Showing conservation header ("seq_conservation" residue attribute) for
alignment 1  
Hiding conservation header for alignment 1  
Chains used in RMSD evaluation for alignment 1: final.casp.pdb #1, 6ntw #2/A  
Showing rmsd header ("seq_rmsd" residue attribute) for alignment 1  
RMSD between 8 pruned atom pairs is 1.090 angstroms; (across all 29 pairs:
8.359)  
  

> matchmaker #1 to #2 alg Smith-Waterman matrix BLOSUM-65 keepComputedSs true

Parameters  
---  
Chain pairing | bb  
Alignment algorithm | Smith-Waterman  
Similarity matrix | BLOSUM-65  
SS fraction | 0.3  
Gap open (HH/SS/other) | 18/18/6  
Gap extend | 1  
SS matrix |  |  | H | S | O  
---|---|---|---  
H | 6 | -9 | -6  
S |  | 6 | -6  
O |  |  | 4  
Iteration cutoff | 2  
  
Matchmaker 6ntw (#2) with final.casp.pdb (#1), sequence alignment score = 35  
RMSD between 8 pruned atom pairs is 1.090 angstroms; (across all 29 pairs:
8.359)  
  

> matchmaker #1 to #2 alg Smith-Waterman matrix PAM-250 keepComputedSs true

Parameters  
---  
Chain pairing | bb  
Alignment algorithm | Smith-Waterman  
Similarity matrix | PAM-250  
SS fraction | 0.3  
Gap open (HH/SS/other) | 18/18/6  
Gap extend | 1  
SS matrix |  |  | H | S | O  
---|---|---|---  
H | 6 | -9 | -6  
S |  | 6 | -6  
O |  |  | 4  
Iteration cutoff | 2  
  
Matchmaker 6ntw (#2) with final.casp.pdb (#1), sequence alignment score = 62.9  
RMSD between 10 pruned atom pairs is 1.311 angstroms; (across all 117 pairs:
21.269)  
  

> matchmaker #1 to #2 alg Smith-Waterman matrix BLOSUM-65 keepComputedSs true

Parameters  
---  
Chain pairing | bb  
Alignment algorithm | Smith-Waterman  
Similarity matrix | BLOSUM-65  
SS fraction | 0.3  
Gap open (HH/SS/other) | 18/18/6  
Gap extend | 1  
SS matrix |  |  | H | S | O  
---|---|---|---  
H | 6 | -9 | -6  
S |  | 6 | -6  
O |  |  | 4  
Iteration cutoff | 2  
  
Matchmaker 6ntw (#2) with final.casp.pdb (#1), sequence alignment score = 35  
RMSD between 8 pruned atom pairs is 1.090 angstroms; (across all 29 pairs:
8.359)  
  

> matchmaker #1 to #2 alg Smith-Waterman matrix PAM-250 keepComputedSs true

Parameters  
---  
Chain pairing | bb  
Alignment algorithm | Smith-Waterman  
Similarity matrix | PAM-250  
SS fraction | 0.3  
Gap open (HH/SS/other) | 18/18/6  
Gap extend | 1  
SS matrix |  |  | H | S | O  
---|---|---|---  
H | 6 | -9 | -6  
S |  | 6 | -6  
O |  |  | 4  
Iteration cutoff | 2  
  
Matchmaker 6ntw (#2) with final.casp.pdb (#1), sequence alignment score = 62.9  
RMSD between 10 pruned atom pairs is 1.311 angstroms; (across all 117 pairs:
21.269)  
  

> matchmaker #!2 to #1 pairing bs alg Smith-Waterman matrix PAM-250
> keepComputedSs true

Parameters  
---  
Chain pairing | bs  
Alignment algorithm | Smith-Waterman  
Similarity matrix | PAM-250  
SS fraction | 0.3  
Gap open (HH/SS/other) | 18/18/6  
Gap extend | 1  
SS matrix |  |  | H | S | O  
---|---|---|---  
H | 6 | -9 | -6  
S |  | 6 | -6  
O |  |  | 4  
Iteration cutoff | 2  
  
Matchmaker final.casp.pdb (#1) with 6ntw (#2), sequence alignment score = 62.9  
RMSD between 10 pruned atom pairs is 1.311 angstroms; (across all 117 pairs:
21.269)  
  
No reference and/or match structure/chain chosen  

> matchmaker #1 to #2/A pairing ss alg Smith-Waterman matrix PAM-250
> keepComputedSs true

Parameters  
---  
Chain pairing | ss  
Alignment algorithm | Smith-Waterman  
Similarity matrix | PAM-250  
SS fraction | 0.3  
Gap open (HH/SS/other) | 18/18/6  
Gap extend | 1  
SS matrix |  |  | H | S | O  
---|---|---|---  
H | 6 | -9 | -6  
S |  | 6 | -6  
O |  |  | 4  
Iteration cutoff | 2  
  
Matchmaker 6ntw (#2) with final.casp.pdb (#1), sequence alignment score = 62.9  
RMSD between 10 pruned atom pairs is 1.311 angstroms; (across all 117 pairs:
21.269)  
  

> matchmaker #2/A to #1 pairing ss alg Smith-Waterman matrix PAM-250
> keepComputedSs true

Parameters  
---  
Chain pairing | ss  
Alignment algorithm | Smith-Waterman  
Similarity matrix | PAM-250  
SS fraction | 0.3  
Gap open (HH/SS/other) | 18/18/6  
Gap extend | 1  
SS matrix |  |  | H | S | O  
---|---|---|---  
H | 6 | -9 | -6  
S |  | 6 | -6  
O |  |  | 4  
Iteration cutoff | 2  
  
Matchmaker final.casp.pdb (#1) with 6ntw (#2), sequence alignment score = 62.9  
RMSD between 10 pruned atom pairs is 1.311 angstroms; (across all 117 pairs:
21.269)  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.1.1.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.1.1.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/ui/widgets/item_chooser.py", line 305, in _items_change  
if not hasattr(self, '_recursion'):  
RuntimeError: wrapped C/C++ object of type ChainMenuButton has been deleted  
  
Error processing trigger "changes":  
RuntimeError: wrapped C/C++ object of type ChainMenuButton has been deleted  
  
File
"/Applications/ChimeraX-1.1.1.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/ui/widgets/item_chooser.py", line 305, in _items_change  
if not hasattr(self, '_recursion'):  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.1.1.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.1.1.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/ui/widgets/item_chooser.py", line 305, in _items_change  
if not hasattr(self, '_recursion'):  
RuntimeError: wrapped C/C++ object of type ChainMenuButton has been deleted  
  
Error processing trigger "changes":  
RuntimeError: wrapped C/C++ object of type ChainMenuButton has been deleted  
  
File
"/Applications/ChimeraX-1.1.1.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/ui/widgets/item_chooser.py", line 305, in _items_change  
if not hasattr(self, '_recursion'):  
  
See log for complete Python traceback.  
  

> matchmaker #!2 to #1 alg Smith-Waterman matrix PAM-250 keepComputedSs true

Parameters  
---  
Chain pairing | bb  
Alignment algorithm | Smith-Waterman  
Similarity matrix | PAM-250  
SS fraction | 0.3  
Gap open (HH/SS/other) | 18/18/6  
Gap extend | 1  
SS matrix |  |  | H | S | O  
---|---|---|---  
H | 6 | -9 | -6  
S |  | 6 | -6  
O |  |  | 4  
Iteration cutoff | 2  
  
Matchmaker final.casp.pdb (#1) with 6ntw (#2), sequence alignment score = 62.9  
RMSD between 10 pruned atom pairs is 1.311 angstroms; (across all 117 pairs:
21.269)  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.1.1.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.1.1.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/ui/widgets/item_chooser.py", line 305, in _items_change  
if not hasattr(self, '_recursion'):  
RuntimeError: wrapped C/C++ object of type ChainMenuButton has been deleted  
  
Error processing trigger "changes":  
RuntimeError: wrapped C/C++ object of type ChainMenuButton has been deleted  
  
File
"/Applications/ChimeraX-1.1.1.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/ui/widgets/item_chooser.py", line 305, in _items_change  
if not hasattr(self, '_recursion'):  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.1.1.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.1.1.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/ui/widgets/item_chooser.py", line 305, in _items_change  
if not hasattr(self, '_recursion'):  
RuntimeError: wrapped C/C++ object of type ChainMenuButton has been deleted  
  
Error processing trigger "changes":  
RuntimeError: wrapped C/C++ object of type ChainMenuButton has been deleted  
  
File
"/Applications/ChimeraX-1.1.1.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/ui/widgets/item_chooser.py", line 305, in _items_change  
if not hasattr(self, '_recursion'):  
  
See log for complete Python traceback.  
  

> ui tool show "Show Sequence Viewer"

> sequence chain #2/A

Alignment identifier is 2/A  

> mmaker #1 to #2 showAlignment true

Parameters  
---  
Chain pairing | bb  
Alignment algorithm | Needleman-Wunsch  
Similarity matrix | BLOSUM-62  
SS fraction | 0.3  
Gap open (HH/SS/other) | 18/18/6  
Gap extend | 1  
SS matrix |  |  | H | S | O  
---|---|---|---  
H | 6 | -9 | -6  
S |  | 6 | -6  
O |  |  | 4  
Iteration cutoff | 2  
  
Matchmaker 6ntw, chain A (#2) with final.casp.pdb, chain (blank) (#1),
sequence alignment score = 20.9  
Alignment identifier is 2  
Showing conservation header ("seq_conservation" residue attribute) for
alignment 2  
Hiding conservation header for alignment 2  
Chains used in RMSD evaluation for alignment 2: final.casp.pdb #1, 6ntw #2/A  
Showing rmsd header ("seq_rmsd" residue attribute) for alignment 2  
RMSD between 6 pruned atom pairs is 1.134 angstroms; (across all 48 pairs:
24.115)  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.1.1.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.1.1.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/ui/widgets/item_chooser.py", line 305, in _items_change  
if not hasattr(self, '_recursion'):  
RuntimeError: wrapped C/C++ object of type ChainMenuButton has been deleted  
  
Error processing trigger "changes":  
RuntimeError: wrapped C/C++ object of type ChainMenuButton has been deleted  
  
File
"/Applications/ChimeraX-1.1.1.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/ui/widgets/item_chooser.py", line 305, in _items_change  
if not hasattr(self, '_recursion'):  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.1.1.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.1.1.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/ui/widgets/item_chooser.py", line 305, in _items_change  
if not hasattr(self, '_recursion'):  
RuntimeError: wrapped C/C++ object of type ChainMenuButton has been deleted  
  
Error processing trigger "changes":  
RuntimeError: wrapped C/C++ object of type ChainMenuButton has been deleted  
  
File
"/Applications/ChimeraX-1.1.1.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/ui/widgets/item_chooser.py", line 305, in _items_change  
if not hasattr(self, '_recursion'):  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.1.1.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.1.1.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/ui/widgets/item_chooser.py", line 305, in _items_change  
if not hasattr(self, '_recursion'):  
RuntimeError: wrapped C/C++ object of type ChainMenuButton has been deleted  
  
Error processing trigger "changes":  
RuntimeError: wrapped C/C++ object of type ChainMenuButton has been deleted  
  
File
"/Applications/ChimeraX-1.1.1.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/ui/widgets/item_chooser.py", line 305, in _items_change  
if not hasattr(self, '_recursion'):  
  
See log for complete Python traceback.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.1.1.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/triggerset.py", line 130, in invoke  
return self._func(self._name, data)  
File
"/Applications/ChimeraX-1.1.1.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/ui/widgets/item_chooser.py", line 305, in _items_change  
if not hasattr(self, '_recursion'):  
RuntimeError: wrapped C/C++ object of type ChainMenuButton has been deleted  
  
Error processing trigger "changes":  
RuntimeError: wrapped C/C++ object of type ChainMenuButton has been deleted  
  
File
"/Applications/ChimeraX-1.1.1.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/ui/widgets/item_chooser.py", line 305, in _items_change  
if not hasattr(self, '_recursion'):  
  
See log for complete Python traceback.  
  




OpenGL version: 4.1 INTEL-14.7.8
OpenGL renderer: Intel(R) Iris(TM) Plus Graphics 655
OpenGL vendor: Intel Inc.Hardware:

    Hardware Overview:

      Model Name: MacBook Pro
      Model Identifier: MacBookPro15,2
      Processor Name: Quad-Core Intel Core i5
      Processor Speed: 2.3 GHz
      Number of Processors: 1
      Total Number of Cores: 4
      L2 Cache (per Core): 256 KB
      L3 Cache: 6 MB
      Hyper-Threading Technology: Enabled
      Memory: 8 GB
      Boot ROM Version: 1037.147.4.0.0 (iBridge: 17.16.16610.0.0,0)

Software:

    System Software Overview:

      System Version: macOS 10.15.7 (19H2)
      Kernel Version: Darwin 19.6.0
      Time since boot: 2:17

Graphics/Displays:

    Intel Iris Plus Graphics 655:

      Chipset Model: Intel Iris Plus Graphics 655
      Type: GPU
      Bus: Built-In
      VRAM (Dynamic, Max): 1536 MB
      Vendor: Intel
      Device ID: 0x3ea5
      Revision ID: 0x0001
      Metal: Supported, feature set macOS GPUFamily2 v1
      Displays:
        R241Y:
          Resolution: 1920 x 1080 (1080p FHD - Full High Definition)
          UI Looks like: 1920 x 1080 @ 60 Hz
          Framebuffer Depth: 30-Bit Color (ARGB2101010)
          Display Serial Number: T6PEE0012411
          Main Display: Yes
          Mirror: Off
          Online: Yes
          Rotation: Supported
          Automatically Adjust Brightness: No
          Connection Type: DVI or HDMI
          Adapter Firmware Version: 7.55

PyQt version: 5.12.3
Compiled Qt version: 5.12.4
Runtime Qt version: 5.12.9
Installed Packages:
    alabaster: 0.7.12
    appdirs: 1.4.4
    appnope: 0.1.0
    Babel: 2.8.0
    backcall: 0.2.0
    blockdiag: 2.0.1
    certifi: 2020.6.20
    chardet: 3.0.4
    ChimeraX-AddH: 2.1.1
    ChimeraX-AlignmentAlgorithms: 2.0
    ChimeraX-AlignmentHdrs: 3.2
    ChimeraX-AlignmentMatrices: 2.0
    ChimeraX-Alignments: 2.1
    ChimeraX-Arrays: 1.0
    ChimeraX-Atomic: 1.6.1
    ChimeraX-AtomSearch: 2.0
    ChimeraX-AxesPlanes: 2.0
    ChimeraX-BasicActions: 1.1
    ChimeraX-BILD: 1.0
    ChimeraX-BlastProtein: 1.0.1
    ChimeraX-BondRot: 2.0
    ChimeraX-BugReporter: 1.0
    ChimeraX-BuildStructure: 2.0
    ChimeraX-Bumps: 1.0
    ChimeraX-BundleBuilder: 1.0
    ChimeraX-ButtonPanel: 1.0
    ChimeraX-CageBuilder: 1.0
    ChimeraX-CellPack: 1.0
    ChimeraX-Centroids: 1.1
    ChimeraX-ChemGroup: 2.0
    ChimeraX-Clashes: 2.0
    ChimeraX-ColorActions: 1.0
    ChimeraX-ColorGlobe: 1.0
    ChimeraX-CommandLine: 1.1.3
    ChimeraX-ConnectStructure: 2.0
    ChimeraX-Contacts: 1.0
    ChimeraX-Core: 1.1.1
    ChimeraX-CoreFormats: 1.0
    ChimeraX-coulombic: 1.0.1
    ChimeraX-Crosslinks: 1.0
    ChimeraX-Crystal: 1.0
    ChimeraX-DataFormats: 1.0
    ChimeraX-Dicom: 1.0
    ChimeraX-DistMonitor: 1.1
    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: 2.0
    ChimeraX-Help: 1.0
    ChimeraX-HKCage: 1.0
    ChimeraX-IHM: 1.0
    ChimeraX-ImageFormats: 1.0
    ChimeraX-IMOD: 1.0
    ChimeraX-IO: 1.0
    ChimeraX-Label: 1.0
    ChimeraX-ListInfo: 1.0
    ChimeraX-Log: 1.1.1
    ChimeraX-LookingGlass: 1.1
    ChimeraX-Map: 1.0.1
    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: 1.1
    ChimeraX-MDcrds: 2.0
    ChimeraX-MedicalToolbar: 1.0.1
    ChimeraX-Meeting: 1.0
    ChimeraX-MLP: 1.0
    ChimeraX-mmCIF: 2.2
    ChimeraX-MMTF: 2.0
    ChimeraX-Modeller: 1.0
    ChimeraX-ModelPanel: 1.0
    ChimeraX-ModelSeries: 1.0
    ChimeraX-Mol2: 2.0
    ChimeraX-Morph: 1.0
    ChimeraX-MouseModes: 1.0
    ChimeraX-Movie: 1.0
    ChimeraX-Neuron: 1.0
    ChimeraX-Nucleotides: 2.0
    ChimeraX-OpenCommand: 1.2.1
    ChimeraX-PDB: 2.1
    ChimeraX-PDBBio: 1.0
    ChimeraX-PickBlobs: 1.0
    ChimeraX-Positions: 1.0
    ChimeraX-PresetMgr: 1.0
    ChimeraX-PubChem: 2.0
    ChimeraX-Read-Pbonds: 1.0
    ChimeraX-Registration: 1.1
    ChimeraX-RemoteControl: 1.0
    ChimeraX-ResidueFit: 1.0
    ChimeraX-RestServer: 1.0
    ChimeraX-RNALayout: 1.0
    ChimeraX-RotamerLibMgr: 2.0
    ChimeraX-RotamerLibsDunbrack: 2.0
    ChimeraX-RotamerLibsDynameomics: 2.0
    ChimeraX-RotamerLibsRichardson: 2.0
    ChimeraX-SaveCommand: 1.2
    ChimeraX-SchemeMgr: 1.0
    ChimeraX-SDF: 2.0
    ChimeraX-Segger: 1.0
    ChimeraX-Segment: 1.0
    ChimeraX-SeqView: 2.2
    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
    ChimeraX-SmoothLines: 1.0
    ChimeraX-SpaceNavigator: 1.0
    ChimeraX-StdCommands: 1.0.4
    ChimeraX-STL: 1.0
    ChimeraX-Storm: 1.0
    ChimeraX-Struts: 1.0
    ChimeraX-Surface: 1.0
    ChimeraX-SwapAA: 2.0
    ChimeraX-SwapRes: 2.0
    ChimeraX-TapeMeasure: 1.0
    ChimeraX-Test: 1.0
    ChimeraX-Toolbar: 1.0
    ChimeraX-ToolshedUtils: 1.0
    ChimeraX-Tug: 1.0
    ChimeraX-UI: 1.2.3
    ChimeraX-uniprot: 2.0
    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: 0.29.20
    decorator: 4.4.2
    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: 0.16
    imagecodecs: 2020.5.30
    imagecodecs-lite: 2020.1.31
    imagesize: 1.2.0
    ipykernel: 5.3.0
    ipython: 7.15.0
    ipython-genutils: 0.2.0
    jedi: 0.17.2
    Jinja2: 2.11.2
    jupyter-client: 6.1.3
    jupyter-core: 4.6.3
    kiwisolver: 1.2.0
    line-profiler: 2.1.2
    lxml: 4.5.1
    MarkupSafe: 1.1.1
    matplotlib: 3.2.1
    msgpack: 1.0.0
    netifaces: 0.10.9
    networkx: 2.4
    numexpr: 2.7.1
    numpy: 1.18.5
    numpydoc: 1.0.0
    openvr: 1.12.501
    packaging: 20.4
    parso: 0.7.1
    pexpect: 4.8.0
    pickleshare: 0.7.5
    Pillow: 7.1.2
    pip: 20.2.2
    pkginfo: 1.5.0.1
    prompt-toolkit: 3.0.7
    psutil: 5.7.0
    ptyprocess: 0.6.0
    pycollada: 0.7.1
    pydicom: 2.0.0
    Pygments: 2.6.1
    PyOpenGL: 3.1.5
    PyOpenGL-accelerate: 3.1.5
    pyparsing: 2.4.7
    PyQt5-commercial: 5.12.3
    PyQt5-sip: 4.19.19
    PyQtWebEngine-commercial: 5.12.1
    python-dateutil: 2.8.1
    pytz: 2020.1
    pyzmq: 19.0.2
    qtconsole: 4.7.4
    QtPy: 1.9.0
    RandomWords: 0.3.0
    requests: 2.24.0
    scipy: 1.4.1
    setuptools: 49.4.0
    sfftk-rw: 0.6.6.dev0
    six: 1.15.0
    snowballstemmer: 2.0.0
    sortedcontainers: 2.2.2
    Sphinx: 3.1.1
    sphinxcontrib-applehelp: 1.0.2
    sphinxcontrib-blockdiag: 2.0.0
    sphinxcontrib-devhelp: 1.0.2
    sphinxcontrib-htmlhelp: 1.0.3
    sphinxcontrib-jsmath: 1.0.1
    sphinxcontrib-qthelp: 1.0.3
    sphinxcontrib-serializinghtml: 1.1.4
    suds-jurko: 0.6
    tables: 3.6.1
    tifffile: 2020.6.3
    tinyarray: 1.2.2
    tornado: 6.0.4
    traitlets: 5.0.4
    urllib3: 1.25.10
    wcwidth: 0.2.5
    webcolors: 1.11.1
    wheel: 0.34.2

[Eric Pettersen]

Run matchmaker GUI. Open 1www twice. Use specific-chain matching. Match two chains. Close second model.

[Eric Pettersen]

Don't call .deleteLater() on the chain widget -- let Python reference counting delete it