'Session' object has no attribute 'preset_mgr'

[chimerax-bug-report@…]

The following bug report has been submitted:
Platform:        Darwin-16.7.0-x86_64-i386-64bit
ChimeraX Version: 0.9 (2019-03-02)
Description
(Describe the actions that caused this problem to occur here)

Log:
UCSF ChimeraX version: 0.9 (2019-03-02)  
© 2016-2019 Regents of the University of California. All rights reserved.  
How to cite UCSF ChimeraX  

> open /Users/Julia/Desktop/ETH/Kaspar/hOST/chimerax/hostB.cxs format session

Unable to restore session, resetting.  
  
Traceback (most recent call last):  
File
"/Applications/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/session.py", line 594, in restore  
obj = sm.restore_snapshot(self, data)  
File
"/Applications/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/preset_mgr/manager.py", line 48, in restore_snapshot  
return session.preset_mgr  
AttributeError: 'Session' object has no attribute 'preset_mgr'  
  
opened ChimeraX session  
Traceback (most recent call last):  
File
"/Applications/ChimeraX.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.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/map/volume.py", line 3482, in _update_drawings  
if v.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()  
  
Error processing trigger "graphics update": object of type 'NoneType' has no
len():  
TypeError: object of type 'NoneType' has no len()  
  
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  
  
See log for complete Python traceback.  
  




OpenGL version: 4.1 INTEL-10.25.19
OpenGL renderer: Intel(R) Iris(TM) Graphics 6100
OpenGL vendor: Intel Inc.