self._positions is None

[chimerax-bug-report@…]

The following bug report has been submitted:
Platform:        Darwin-16.7.0-x86_64-i386-64bit
ChimeraX Version: 0.9 (2019-03-06)
Description
(Describe the actions that caused this problem to occur here)

Log:
UCSF ChimeraX version: 0.9 (2019-03-06)  
© 2016-2019 Regents of the University of California. All rights reserved.  
How to cite UCSF ChimeraX  

> open "/Users/anakha/Downloads/Mitochondrial genetics/Cryo EM data/2019_
Maps_models_comparison/Models/Models_updated/IF3-only_job98_noH.pdb"

Chain information for IF3-only_job98_noH.pdb #1  
---  
Chain | Description  
0 | No description available  
1 | No description available  
2 | No description available  
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8 | No description available  
A | No description available  
B | No description available  
C | No description available  
D | No description available  
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G | No description available  
H | No description available  
I | No description available  
J | No description available  
K | No description available  
L | No description available  
M | No description available  
N | No description available  
O | No description available  
P | No description available  
Q | No description available  
R | No description available  
S | No description available  
T | No description available  
U | No description available  
V | No description available  
W | No description available  
X | No description available  
Y | No description available  
Z | No description available  
  

> set bgColor white

> hide selAtoms

> show selAtoms ribbons

> color #1 rgb(1.0,0.84,0.0)

> color #1/A rgb(1.0,1.0,0.5)

> color #1/8:61-131 purple

> color #1/8:131-157 grey

> color #1/8:157-245 orange

> color #1/8:245-278 firebrick

> style ringFill on

Changed 7019 residue ring styles  

> show #1/A:988-990, 995-997 bonds

> hide selAtoms surfaces

> style selAtoms stick

Changed 68871 atom styles  

> show #1/8:72,74,75,76,77,113,115 bonds

An error occurred in drawing the scene. Redrawing graphics is now stopped to
avoid a continuous stream of error messages. To restart graphics use the
command "graphics restart" after changing the settings that caused the error.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/updateloop.py", line 72, in draw_new_frame  
view.draw(check_for_changes = False)  
File
"/Applications/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/graphics/view.py", line 159, in draw  
self._draw_scene(camera, drawings)  
File
"/Applications/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/graphics/view.py", line 214, in _draw_scene  
draw_depth(r, opaque_drawings)  
File
"/Applications/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/graphics/drawing.py", line 1406, in draw_depth  
draw_opaque(r, drawings)  
File
"/Applications/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/graphics/drawing.py", line 1387, in draw_opaque  
_draw_multiple(drawings, renderer, Drawing.OPAQUE_DRAW_PASS)  
File
"/Applications/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/graphics/drawing.py", line 1398, in _draw_multiple  
d.draw(renderer, draw_pass)  
File
"/Applications/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/graphics/drawing.py", line 692, in draw  
if not self.display:  
File
"/Applications/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/graphics/drawing.py", line 317, in get_display  
return self._any_displayed_positions and len(self._positions) > 0  
TypeError: object of type 'NoneType' has no len()  
  




OpenGL version: 4.1 INTEL-10.25.17
OpenGL renderer: Intel(R) Iris(TM) Plus Graphics 640
OpenGL vendor: Intel Inc.