Problem restoring session: invalid load key

[sharmishthamusalgaonkar@…]

The following bug report has been submitted:
Platform:        Windows-10-10.0.19041
ChimeraX Version: 0.93 (2020-04-03)
Description
trouble opening the session file. error message was as follows:
UCSF ChimeraX version: 0.93 (2020-04-03) © 2016-2020 Regents of the University of California. All rights reserved. How to cite UCSF ChimeraX 
open2 "C:/Users/sharmishtha/Box/Lab Share/Projects/Reh1 extension/structures/sm-session.cxs"
Traceback (most recent call last):   File "C:\Program Files\ChimeraX\bin\lib\site-packages\chimerax\open_command\dialog.py", line 146, in _qt_safe     if data_format is None else " format " + StringArg.unparse(data_format.nicknames[0])))   File "C:\Program Files\ChimeraX\bin\lib\site-packages\chimerax\core\commands\run.py", line 31, in run     results = command.run(text, log=log)   File "C:\Program Files\ChimeraX\bin\lib\site-packages\chimerax\core\commands\cli.py", line 2848, in run     result = ci.function(session, **kw_args)   File "C:\Program Files\ChimeraX\bin\lib\site-packages\chimerax\open_command\cmd.py", line 86, in cmd_open     Command(session, registry=registry).run(provider_cmd_text, log=log)   File "C:\Program Files\ChimeraX\bin\lib\site-packages\chimerax\core\commands\cli.py", line 2848, in run     result = ci.function(session, **kw_args)   File "C:\Program Files\ChimeraX\bin\lib\site-packages\chimerax\open_command\cmd.py", line 136, in provider_open     name or model_name_from_path(fi.file_name)), provider_kw)   File "C:\Program Files\ChimeraX\bin\lib\site-packages\chimerax\open_command\cmd.py", line 344, in collated_open     return func(*func_args, **func_kw)   File "C:\Program Files\ChimeraX\bin\lib\site-packages\chimerax\core_formats\__init__.py", line 26, in open     return cxs_open(session, data, **kw)   File "C:\Program Files\ChimeraX\bin\lib\site-packages\chimerax\core\session.py", line 909, in open     session.restore(stream, path=path, resize_window=resize_window)   File "C:\Program Files\ChimeraX\bin\lib\site-packages\chimerax\core\session.py", line 589, in restore     version = serialize.pickle_deserialize(stream)   File "C:\Program Files\ChimeraX\bin\lib\site-packages\chimerax\core\serialize.py", line 57, in pickle_deserialize     return unpickler.load() _pickle.UnpicklingError: invalid load key, '\x04'. _pickle.UnpicklingError: invalid load key, '\x04'. File "C:\Program Files\ChimeraX\bin\lib\site-packages\chimerax\core\serialize.py", line 57, in pickle_deserialize return unpickler.load() See log for complete Python traceback. 

Log:
UCSF ChimeraX version: 0.93 (2020-04-03)  
© 2016-2020 Regents of the University of California. All rights reserved.  
How to cite UCSF ChimeraX  

> open2 "C:/Users/sharmishtha/Box/Lab Share/Projects/Reh1
> extension/structures/sm-session.cxs"

Traceback (most recent call last):  
File "C:\Program Files\ChimeraX\bin\lib\site-
packages\chimerax\open_command\dialog.py", line 146, in _qt_safe  
if data_format is None else " format " +
StringArg.unparse(data_format.nicknames[0])))  
File "C:\Program Files\ChimeraX\bin\lib\site-
packages\chimerax\core\commands\run.py", line 31, in run  
results = command.run(text, log=log)  
File "C:\Program Files\ChimeraX\bin\lib\site-
packages\chimerax\core\commands\cli.py", line 2848, in run  
result = ci.function(session, **kw_args)  
File "C:\Program Files\ChimeraX\bin\lib\site-
packages\chimerax\open_command\cmd.py", line 86, in cmd_open  
Command(session, registry=registry).run(provider_cmd_text, log=log)  
File "C:\Program Files\ChimeraX\bin\lib\site-
packages\chimerax\core\commands\cli.py", line 2848, in run  
result = ci.function(session, **kw_args)  
File "C:\Program Files\ChimeraX\bin\lib\site-
packages\chimerax\open_command\cmd.py", line 136, in provider_open  
name or model_name_from_path(fi.file_name)), provider_kw)  
File "C:\Program Files\ChimeraX\bin\lib\site-
packages\chimerax\open_command\cmd.py", line 344, in collated_open  
return func(*func_args, **func_kw)  
File "C:\Program Files\ChimeraX\bin\lib\site-
packages\chimerax\core_formats\\__init__.py", line 26, in open  
return cxs_open(session, data, **kw)  
File "C:\Program Files\ChimeraX\bin\lib\site-
packages\chimerax\core\session.py", line 909, in open  
session.restore(stream, path=path, resize_window=resize_window)  
File "C:\Program Files\ChimeraX\bin\lib\site-
packages\chimerax\core\session.py", line 589, in restore  
version = serialize.pickle_deserialize(stream)  
File "C:\Program Files\ChimeraX\bin\lib\site-
packages\chimerax\core\serialize.py", line 57, in pickle_deserialize  
return unpickler.load()  
_pickle.UnpicklingError: invalid load key, '\x04'.  
  
_pickle.UnpicklingError: invalid load key, '\x04'.  
  
File "C:\Program Files\ChimeraX\bin\lib\site-
packages\chimerax\core\serialize.py", line 57, in pickle_deserialize  
return unpickler.load()  
  
See log for complete Python traceback.  
  




OpenGL version: 3.3.0 - Build 23.20.16.4973
OpenGL renderer: Intel(R) HD Graphics 520
OpenGL vendor: Intel
Manufacturer: Dell Inc.
Model: Inspiron 13-7359
OS: Microsoft Windows 10 Home (Build 19044)
Memory: 17,030,201,344
MaxProcessMemory: 137,438,953,344
CPU: 4 Intel(R) Core(TM) i7-6500U CPU @ 2.50GHz"

[pett]

Hi Sharmishtha,

This problem occurs when trying to open a session made with a newer ChimeraX in an older version. You need to update ChimeraX on that Windows box if you want to be able to open that session.

--Eric

Eric Pettersen
UCSF Computer Graphics Lab