I have installed ucsf-chimerax-1.8-1.el9.x86_64.rpm on a fedora 40 pc.

Installation was fine.

When I launch 'chimerax' I get the following error:

$ chimerax
Fatal Python error: Segmentation fault

Current thread 0x00001500f588ab80 (most recent call first):
File "<frozen importlib._bootstrap>", line 241 in _call_with_frames_removed
File "<frozen importlib._bootstrap_external>", line 1233 in create_module
File "<frozen importlib._bootstrap>", line 573 in module_from_spec
File "<frozen importlib._bootstrap>", line 676 in _load_unlocked
File "<frozen importlib._bootstrap>", line 1147 in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 1176 in _find_and_load
File "/usr/libexec/UCSF-ChimeraX/lib/python3.11/site-packages/Qt/QtWebEngineWidgets.py", line 4 in <module>
File "<frozen importlib._bootstrap>", line 241 in _call_with_frames_removed
File "<frozen importlib._bootstrap_external>", line 940 in exec_module
File "<frozen importlib._bootstrap>", line 690 in _load_unlocked
File "<frozen importlib._bootstrap>", line 1147 in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 1176 in _find_and_load
File "<frozen importlib._bootstrap>", line 241 in _call_with_frames_removed
File "<frozen importlib._bootstrap>", line 1232 in _handle_fromlist
File "/usr/libexec/UCSF-ChimeraX/lib/python3.11/site-packages/Qt/__init__.py", line 112 in qt_have_web_engine
File "/usr/libexec/UCSF-ChimeraX/lib/python3.11/site-packages/chimerax/ui/gui.py", line 108 in __init__
File "/usr/libexec/UCSF-ChimeraX/lib/python3.11/site-packages/chimerax/core/__main__.py", line 653 in init
File "/usr/libexec/UCSF-ChimeraX/lib/python3.11/site-packages/chimerax/core/__main__.py", line 1166 in <module>
File "<frozen runpy>", line 88 in _run_code
File "<frozen runpy>", line 198 in _run_module_as_main

Extension modules: chimerax.arrays._arrays, numpy.core._multiarray_umath, numpy.core._multiarray_tests, numpy.linalg._umath_linalg, numpy.fft._pocketfft_internal,
numpy.random._common, numpy.random.bit_generator, numpy.random._bounded_integers, numpy.random._mt19937, numpy.random.mtrand, numpy.random._philox, numpy.random._p
cg64, numpy.random._sfc64, numpy.random._generator, chimerax.geometry._geometry, PyQt6.QtCore, PyQt6.QtGui, PyQt6.QtWidgets (total: 18)
Segmentation fault (core dumped)

Any hint?

Thanks

Vito

Dr. Vito Calderone Ph.D.

Associate Professor of Inorganic Chemistry

CERM and Department of Chemistry

University of Florence

Via Luigi Sacconi, 6

50019 Sesto Fiorentino (FI)

Italy

tel: +39 055 457 4276