I find that that example code also hangs in Chimera 1.15 most of the time. The problem seems to be with matplotlib showing the plot window. If the plot window shows then it does not hang. If the plot window does not show then it hangs. Which happens seems to depend on some timing issue. When I click on the Recent Files button for script 3DFSCPlot_Chimera.cmd (which I previously tried to open by command) then it seemed to always work. Sometimes it works 3 times in a row with the command, then hangs for the next 3 tries.

I did my test on macOS Big Sur (11.5.7). Maybe the problem depends on your operating system. I would not be surprised if this is a macOS-only Tk bug. It appears to be a problem with the Tk window toolkit showing the matplotlib window. The poor support for the archaic Tk toolkit used by Chimera is a major reason why we developed ChimeraX based on the Qt window toolkit.

At any rate, I don't have any suggestion for fixing this. We only debug and fix critical bugs in Chimera, all funding has for many years been for ChimeraX development only.

Tom

On Sep 23, 2021, at 4:23 PM, Oliver Clarke via Chimera-users <chimera-users@cgl.ucsf.edu> wrote:

Hi,

Running the chimera command file included with the example data for 3D-FSC (https://github.com/LyumkisLab/3DFSC/tree/master/Example/Results_T40-3DFSC/Chimera) causes the latest daily build of Chimera to freeze - it executes lineplot.py, but then just locks up and does not respond. This happens whether I run it as `chimera 3DFSCPlot_Chimera.cmd` or load the command file after opening the GUI. Am I doing something wrong, or has something changed in Chimera that has broken this script?

Cheers
Oli
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