eman2 core dumping when trying to use GUI

[Tim Kirk]

Everything was working a few weeks ago, but now just get core dumps on trying to open the GUI. I've tried building a new eman2.99.70 in a fresh conda environment just in case but it won't even run the e2display.py test script (e2version.py & e2speedtest.py tests run fine). Version and error message output below :

EMAN 2.99.70 ( GITHUB: 2025-09-18 12:57 - commit: 139f6add9 )

Your EMAN2 is running on: Linux-6.8.0-79-generic-x86_64-with-glibc2.39 6.8.0-79-generic

Your Python version is: 3.12.11

$ e2display.py 

Traceback (most recent call last):

  File "/y/programs/conda_envs/eman2.99.70/bin/e2display.py", line 257, in <module>

    main()

  File "/y/programs/conda_envs/eman2.99.70/bin/e2display.py", line 97, in main

    dialog = embrowser.EMBrowserWidget(withmodal=False,multiselect=False)

             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  File "/y/programs/conda_envs/eman2.99.70/lib/python3.12/site-packages/eman2_gui/embrowser.py", line 3927,

 in __init__

    self.wbutmisc[-1].clicked[bool].connect(lambda x, v = i*2+j :self.buttonMisc(v))

    ~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^

KeyError: 'there is no matching overloaded signal'

[Steve Ludtke]

Hmm... I'm not having this problem. My first guess is that a new version of PyQt came out and they deprecated a previously allowed mechanism. Indeed, the error you're getting is from an older style of PyQt, but still works fine on my machine, which has a Conda env which is only a few weeks old. 

Could you run 

conda list | grep -i qt

and give the output. This may be something we have to fix. A temporary solution might be to manually install an older version of PyQt. 

conda install pyqt=5.15.11

might temporarily resolve the issue (this is the version I'm using on my main workstation right now. If this is the issue, let me know so we can apply a fix. This will require changing a couple of hundred lines of code most likely, so if it isn't necessary I may defer it...

thx

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[Tim Kirk]

Thanks Steve,

From the eman2.99.70 conda environment, looks like we are already using pyqt 5.15.11 :

conda list | grep -i qt

pyqt                      5.15.11         py312hcec5e1c_0    conda-forge

pyqt5-sip                 12.17.0         py312h2ec8cdc_0    conda-forge

qt-main                   5.15.15              h3a7ef08_5    conda-forge

qt6-main                  6.9.2                h5bd77bc_1    conda-forge

A working eman2.99.68 environment is only slightly different :

conda list | grep -i qt

pyqt                      5.15.11         py312hcec5e1c_0    conda-forge

pyqt5-sip                 12.17.0         py312h2ec8cdc_0    conda-forge

qt-main                   5.15.15              hea1682b_4    conda-forge

qt6-main                  6.9.1                h0384650_0    conda-forge