The following bug report has been submitted:
Platform: Linux-5.4.0-74-generic-x86_64-with-glibc2.31
ChimeraX Version: 1.6.1 (2023-05-09 17:57:07 UTC)
Description
Last time you used ChimeraX it crashed.
Please describe steps that led to the crash here.
Fatal Python error: Segmentation fault
Thread 0x00007f8f15ffb700 (most recent call first):
File "/usr/lib/ucsf-chimerax/lib/python3.11/socket.py", line 836 in create_connection
File "/usr/lib/ucsf-chimerax/lib/python3.11/http/client.py", line 945 in connect
File "/usr/lib/ucsf-chimerax/lib/python3.11/http/client.py", line 1451 in connect
File "/usr/lib/ucsf-chimerax/lib/python3.11/http/client.py", line 979 in send
File "/usr/lib/ucsf-chimerax/lib/python3.11/http/client.py", line 1041 in _send_output
File "/usr/lib/ucsf-chimerax/lib/python3.11/http/client.py", line 1281 in endheaders
File "/usr/lib/ucsf-chimerax/lib/python3.11/http/client.py", line 1332 in _send_request
File "/usr/lib/ucsf-chimerax/lib/python3.11/http/client.py", line 1286 in request
File "/usr/lib/ucsf-chimerax/lib/python3.11/urllib/request.py", line 1348 in do_open
File "/usr/lib/ucsf-chimerax/lib/python3.11/urllib/request.py", line 1391 in https_open
File "/usr/lib/ucsf-chimerax/lib/python3.11/urllib/request.py", line 496 in _call_chain
File "/usr/lib/ucsf-chimerax/lib/python3.11/urllib/request.py", line 536 in _open
File "/usr/lib/ucsf-chimerax/lib/python3.11/urllib/request.py", line 519 in open
File "/usr/lib/ucsf-chimerax/lib/python3.11/urllib/request.py", line 216 in urlopen
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-packages/chimerax/core/toolshed/available.py", line 62 in load
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-packages/chimerax/core/toolshed/__init__.py", line 467 in reload_available
File "/usr/lib/ucsf-chimerax/lib/python3.11/threading.py", line 975 in run
File "/usr/lib/ucsf-chimerax/lib/python3.11/threading.py", line 1038 in _bootstrap_inner
File "/usr/lib/ucsf-chimerax/lib/python3.11/threading.py", line 995 in _bootstrap
Thread 0x00007f8fef8db740 (most recent call first):
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-packages/chimerax/ui/gui.py", line 315 in event_loop
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-packages/chimerax/core/__main__.py", line 1003 in init
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-packages/chimerax/core/__main__.py", line 1166 in
File "", line 88 in _run_code
File "", 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._pcg64, numpy.random._sfc64, numpy.random._generator, chimerax.geometry._geometry, PyQt6.QtCore, PyQt6.QtGui, PyQt6.QtWidgets, PyQt6.QtNetwork, PyQt6.QtPrintSupport, PyQt6.QtWebChannel, PyQt6.QtWebEngineCore, PyQt6.QtWebEngineWidgets, chimerax.atomic_lib._load_libs, tinyarray, chimerax.atomic.cymol, chimerax.atomic.cytmpl, chimerax.map._map, charset_normalizer.md, PIL._imaging, matplotlib._c_internal_utils, matplotlib._path, kiwisolver._cext, matplotlib._image, chimerax.surface._surface, chimerax.pdb_lib._load_libs, lxml._elementpath, lxml.etree, OpenGL_accelerate.errorchecker, OpenGL_accelerate.wrapper, OpenGL_accelerate.formathandler, OpenGL_accelerate.arraydatatype, OpenGL_accelerate.latebind, OpenGL_accelerate.vbo, PIL._imagingmath, OpenGL_accelerate.numpy_formathandler, OpenGL_accelerate.nones_formathandler (total: 47)
===== Log before crash start =====
Startup Messages
---
note | available bundle cache has not been initialized yet
UCSF ChimeraX version: 1.8 (2024-06-10)
© 2016-2024 Regents of the University of California. All rights reserved.
How to cite UCSF ChimeraX
Traceback (most recent call last):
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/chimerax/ui/statusbar.py", line 84, in _expose_event
self.status(self._last_message, self._last_color)
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/chimerax/ui/statusbar.py", line 151, in status
self._draw_text(msg, color, secondary)
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/chimerax/ui/statusbar.py", line 161, in _draw_text
draw_overlays(dlist, self._renderer)
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/chimerax/graphics/drawing.py", line 1608, in draw_overlays
_draw_multiple(drawings, r, Drawing.TRANSPARENT_DRAW_PASS)
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/chimerax/graphics/drawing.py", line 1567, in _draw_multiple
d.draw(renderer, draw_pass)
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/chimerax/graphics/drawing.py", line 780, in draw
self.draw_self(renderer, draw_pass)
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/chimerax/graphics/drawing.py", line 791, in draw_self
self._draw_geometry(renderer, transparent_only = any_opaque)
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/chimerax/graphics/drawing.py", line 814, in _draw_geometry
ds.activate_bindings(renderer)
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/chimerax/graphics/drawing.py", line 1924, in activate_bindings
self.update_buffers()
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/chimerax/graphics/drawing.py", line 1914, in update_buffers
bi.bind_shader_variable(b)
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/chimerax/graphics/opengl.py", line 2566, in bind_shader_variable
GL.glVertexAttribPointer(attr_id, ncomp, gtype, normalize, 0, None)
File "src/latebind.pyx", line 51, in OpenGL_accelerate.latebind.Curry.__call__
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/OpenGL/GL/VERSION/GL_2_0.py", line 469, in glVertexAttribPointer
contextdata.setValue( key, array )
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/OpenGL/contextdata.py", line 58, in setValue
context = getContext( context )
^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/OpenGL/contextdata.py", line 40, in getContext
raise error.Error(
OpenGL.error.Error: Attempt to retrieve context when no valid context
OpenGL.error.Error: Attempt to retrieve context when no valid context
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/OpenGL/contextdata.py", line 40, in getContext
raise error.Error(
See log for complete Python traceback.
Traceback (most recent call last):
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/chimerax/ui/statusbar.py", line 84, in _expose_event
self.status(self._last_message, self._last_color)
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/chimerax/ui/statusbar.py", line 151, in status
self._draw_text(msg, color, secondary)
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/chimerax/ui/statusbar.py", line 161, in _draw_text
draw_overlays(dlist, self._renderer)
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/chimerax/graphics/drawing.py", line 1608, in draw_overlays
_draw_multiple(drawings, r, Drawing.TRANSPARENT_DRAW_PASS)
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/chimerax/graphics/drawing.py", line 1567, in _draw_multiple
d.draw(renderer, draw_pass)
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/chimerax/graphics/drawing.py", line 780, in draw
self.draw_self(renderer, draw_pass)
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/chimerax/graphics/drawing.py", line 791, in draw_self
self._draw_geometry(renderer, transparent_only = any_opaque)
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/chimerax/graphics/drawing.py", line 814, in _draw_geometry
ds.activate_bindings(renderer)
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/chimerax/graphics/drawing.py", line 1924, in activate_bindings
self.update_buffers()
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/chimerax/graphics/drawing.py", line 1914, in update_buffers
bi.bind_shader_variable(b)
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/chimerax/graphics/opengl.py", line 2566, in bind_shader_variable
GL.glVertexAttribPointer(attr_id, ncomp, gtype, normalize, 0, None)
File "src/latebind.pyx", line 51, in OpenGL_accelerate.latebind.Curry.__call__
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/OpenGL/GL/VERSION/GL_2_0.py", line 469, in glVertexAttribPointer
contextdata.setValue( key, array )
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/OpenGL/contextdata.py", line 58, in setValue
context = getContext( context )
^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/OpenGL/contextdata.py", line 40, in getContext
raise error.Error(
OpenGL.error.Error: Attempt to retrieve context when no valid context
OpenGL.error.Error: Attempt to retrieve context when no valid context
File "/usr/lib/ucsf-chimerax/lib/python3.11/site-
packages/OpenGL/contextdata.py", line 40, in getContext
raise error.Error(
See log for complete Python traceback.
===== Log before crash end =====
Log:
Startup Messages
---
warning | Replacing fetcher for 'pdb_nmr' and format NMRSTAR from NMRSTAR
bundle with that from NMRSTAR bundle
UCSF ChimeraX version: 1.6.1 (2023-05-09)
© 2016-2023 Regents of the University of California. All rights reserved.
How to cite UCSF ChimeraX
OpenGL version: 4.6 (Core Profile) Mesa 20.3.4
OpenGL renderer: AMD RAVEN (DRM 3.40.0, 5.4.0-74-generic, LLVM 11.0.1)
OpenGL vendor: AMD
Python: 3.9.11
Locale: en_US.UTF-8
Qt version: PyQt6 6.4.2, Qt 6.4.2
Qt runtime version: 6.4.3
Qt platform: xcb
XDG_SESSION_TYPE=x11
DESKTOP_SESSION=cinnamon
XDG_SESSION_DESKTOP=cinnamon
XDG_CURRENT_DESKTOP=X-Cinnamon
DISPLAY=:0
Manufacturer: LENOVO
Model: 81NC
OS: Ubuntu 20.04 Focal Fossa
Architecture: 64bit ELF
Virtual Machine: none
CPU: 8 AMD Ryzen 7 3700U with Radeon Vega Mobile Gfx
Cache Size: 512 KB
Memory:
total used free shared buff/cache available
Mem: 5.7Gi 1.1Gi 113Mi 18Mi 4.5Gi 4.3Gi
Swap: 8.4Gi 392Mi 8.0Gi
Graphics:
04:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Picasso [1002:15d8] (rev c1)
Subsystem: Lenovo Picasso [17aa:3802]
Kernel driver in use: amdgpu
Installed Packages:
alabaster: 0.7.13
appdirs: 1.4.4
asttokens: 2.2.1
Babel: 2.12.1
backcall: 0.2.0
beautifulsoup4: 4.11.2
blockdiag: 3.0.0
build: 0.10.0
certifi: 2023.5.7
cftime: 1.6.2
charset-normalizer: 3.1.0
ChimeraX-AddCharge: 1.5.9.1
ChimeraX-AddH: 2.2.5
ChimeraX-AlignmentAlgorithms: 2.0.1
ChimeraX-AlignmentHdrs: 3.3.1
ChimeraX-AlignmentMatrices: 2.1
ChimeraX-Alignments: 2.9.3
ChimeraX-AlphaFold: 1.0
ChimeraX-AltlocExplorer: 1.0.3
ChimeraX-AmberInfo: 1.0
ChimeraX-Arrays: 1.1
ChimeraX-Atomic: 1.43.10
ChimeraX-AtomicLibrary: 10.0.6
ChimeraX-AtomSearch: 2.0.1
ChimeraX-AxesPlanes: 2.3.2
ChimeraX-BasicActions: 1.1.2
ChimeraX-BILD: 1.0
ChimeraX-BlastProtein: 2.1.2
ChimeraX-BondRot: 2.0.1
ChimeraX-BugReporter: 1.0.1
ChimeraX-BuildStructure: 2.8
ChimeraX-Bumps: 1.0
ChimeraX-BundleBuilder: 1.2.2
ChimeraX-ButtonPanel: 1.0.1
ChimeraX-CageBuilder: 1.0.1
ChimeraX-CellPack: 1.0
ChimeraX-Centroids: 1.3.2
ChimeraX-ChangeChains: 1.0.2
ChimeraX-CheckWaters: 1.3.1
ChimeraX-ChemGroup: 2.0.1
ChimeraX-Clashes: 2.2.4
ChimeraX-ColorActions: 1.0.3
ChimeraX-ColorGlobe: 1.0
ChimeraX-ColorKey: 1.5.3
ChimeraX-CommandLine: 1.2.5
ChimeraX-ConnectStructure: 2.0.1
ChimeraX-Contacts: 1.0.1
ChimeraX-Core: 1.6.1
ChimeraX-CoreFormats: 1.1
ChimeraX-coulombic: 1.4.2
ChimeraX-Crosslinks: 1.0
ChimeraX-Crystal: 1.0
ChimeraX-CrystalContacts: 1.0.1
ChimeraX-DataFormats: 1.2.3
ChimeraX-Dicom: 1.2
ChimeraX-DistMonitor: 1.4
ChimeraX-DockPrep: 1.1.1
ChimeraX-Dssp: 2.0
ChimeraX-EMDB-SFF: 1.0
ChimeraX-ESMFold: 1.0
ChimeraX-FileHistory: 1.0.1
ChimeraX-FunctionKey: 1.0.1
ChimeraX-Geometry: 1.3
ChimeraX-gltf: 1.0
ChimeraX-Graphics: 1.1.1
ChimeraX-Hbonds: 2.4
ChimeraX-Help: 1.2.1
ChimeraX-HKCage: 1.3
ChimeraX-IHM: 1.1
ChimeraX-ImageFormats: 1.2
ChimeraX-IMOD: 1.0
ChimeraX-IO: 1.0.1
ChimeraX-ItemsInspection: 1.0.1
ChimeraX-Label: 1.1.7
ChimeraX-LinuxSupport: 1.0.1
ChimeraX-ListInfo: 1.1.1
ChimeraX-Log: 1.1.5
ChimeraX-LookingGlass: 1.1
ChimeraX-Maestro: 1.8.2
ChimeraX-Map: 1.1.4
ChimeraX-MapData: 2.0
ChimeraX-MapEraser: 1.0.1
ChimeraX-MapFilter: 2.0.1
ChimeraX-MapFit: 2.0
ChimeraX-MapSeries: 2.1.1
ChimeraX-Markers: 1.0.1
ChimeraX-Mask: 1.0.2
ChimeraX-MatchMaker: 2.0.12
ChimeraX-MDcrds: 2.6
ChimeraX-MedicalToolbar: 1.0.2
ChimeraX-Meeting: 1.0.1
ChimeraX-MLP: 1.1.1
ChimeraX-mmCIF: 2.12
ChimeraX-MMTF: 2.2
ChimeraX-Modeller: 1.5.9
ChimeraX-ModelPanel: 1.3.7
ChimeraX-ModelSeries: 1.0.1
ChimeraX-Mol2: 2.0
ChimeraX-Mole: 1.0
ChimeraX-Morph: 1.0.2
ChimeraX-MouseModes: 1.2
ChimeraX-Movie: 1.0
ChimeraX-Neuron: 1.0
ChimeraX-Nifti: 1.0
ChimeraX-NRRD: 1.0
ChimeraX-Nucleotides: 2.0.3
ChimeraX-OpenCommand: 1.10.1
ChimeraX-PDB: 2.7.2
ChimeraX-PDBBio: 1.0
ChimeraX-PDBLibrary: 1.0.2
ChimeraX-PDBMatrices: 1.0
ChimeraX-PickBlobs: 1.0.1
ChimeraX-PICKLUSTER: 0.5
ChimeraX-Positions: 1.0
ChimeraX-PresetMgr: 1.1
ChimeraX-PubChem: 2.1
ChimeraX-ReadPbonds: 1.0.1
ChimeraX-Registration: 1.1.1
ChimeraX-RemoteControl: 1.0
ChimeraX-RenderByAttr: 1.1
ChimeraX-RenumberResidues: 1.1
ChimeraX-ResidueFit: 1.0.1
ChimeraX-RestServer: 1.1
ChimeraX-RNALayout: 1.0
ChimeraX-RotamerLibMgr: 3.0
ChimeraX-RotamerLibsDunbrack: 2.0
ChimeraX-RotamerLibsDynameomics: 2.0
ChimeraX-RotamerLibsRichardson: 2.0
ChimeraX-SaveCommand: 1.5.1
ChimeraX-SchemeMgr: 1.0
ChimeraX-SDF: 2.0.1
ChimeraX-Segger: 1.0
ChimeraX-Segment: 1.0.1
ChimeraX-SelInspector: 1.0
ChimeraX-SeqView: 2.8.3
ChimeraX-Shape: 1.0.1
ChimeraX-Shell: 1.0.1
ChimeraX-Shortcuts: 1.1.1
ChimeraX-ShowSequences: 1.0.1
ChimeraX-SideView: 1.0.1
ChimeraX-Smiles: 2.1
ChimeraX-SmoothLines: 1.0
ChimeraX-SpaceNavigator: 1.0
ChimeraX-StarMap: 1.2.15
ChimeraX-StdCommands: 1.10.3
ChimeraX-STL: 1.0.1
ChimeraX-Storm: 1.0
ChimeraX-StructMeasure: 1.1.2
ChimeraX-Struts: 1.0.1
ChimeraX-Surface: 1.0.1
ChimeraX-SwapAA: 2.0.1
ChimeraX-SwapRes: 2.2.1
ChimeraX-TapeMeasure: 1.0
ChimeraX-Test: 1.0
ChimeraX-Toolbar: 1.1.2
ChimeraX-ToolshedUtils: 1.2.1
ChimeraX-Topography: 1.0
ChimeraX-Tug: 1.0.1
ChimeraX-UI: 1.28.4
ChimeraX-uniprot: 2.2.2
ChimeraX-UnitCell: 1.0.1
ChimeraX-ViewDockX: 1.2
ChimeraX-VIPERdb: 1.0
ChimeraX-Vive: 1.1
ChimeraX-VolumeMenu: 1.0.1
ChimeraX-VTK: 1.0
ChimeraX-WavefrontOBJ: 1.0
ChimeraX-WebCam: 1.0.2
ChimeraX-WebServices: 1.1.1
ChimeraX-Zone: 1.0.1
colorama: 0.4.6
comm: 0.1.3
contourpy: 1.0.7
cxservices: 1.2.2
cycler: 0.11.0
Cython: 0.29.33
debugpy: 1.6.7
decorator: 5.1.1
distro: 1.7.0
docutils: 0.19
executing: 1.2.0
filelock: 3.9.0
fonttools: 4.39.3
funcparserlib: 1.0.1
grako: 3.16.5
h5py: 3.8.0
html2text: 2020.1.16
idna: 3.4
ihm: 0.35
imagecodecs: 2022.9.26
imagesize: 1.4.1
importlib-metadata: 6.6.0
ipykernel: 6.21.1
ipython: 8.10.0
ipython-genutils: 0.2.0
ipywidgets: 8.0.6
jedi: 0.18.2
Jinja2: 3.1.2
jupyter-client: 8.0.2
jupyter-core: 5.3.0
jupyterlab-widgets: 3.0.7
kiwisolver: 1.4.4
line-profiler: 4.0.2
lxml: 4.9.2
lz4: 4.3.2
MarkupSafe: 2.1.2
matplotlib: 3.6.3
matplotlib-inline: 0.1.6
MolecularDynamicsViewer: 1.4
msgpack: 1.0.4
nest-asyncio: 1.5.6
netCDF4: 1.6.2
networkx: 2.8.8
nibabel: 5.0.1
nptyping: 2.5.0
numexpr: 2.8.4
numpy: 1.23.5
openvr: 1.23.701
packaging: 23.1
ParmEd: 3.4.3
parso: 0.8.3
pep517: 0.13.0
pexpect: 4.8.0
pickleshare: 0.7.5
Pillow: 9.3.0
pip: 23.0
pkginfo: 1.9.6
platformdirs: 3.5.0
prompt-toolkit: 3.0.38
psutil: 5.9.4
ptyprocess: 0.7.0
pure-eval: 0.2.2
pycollada: 0.7.2
pydicom: 2.3.0
Pygments: 2.14.0
pynrrd: 1.0.0
PyOpenGL: 3.1.5
PyOpenGL-accelerate: 3.1.5
pyparsing: 3.0.9
pyproject-hooks: 1.0.0
PyQt6-commercial: 6.4.2
PyQt6-Qt6: 6.4.3
PyQt6-sip: 13.4.1
PyQt6-WebEngine-commercial: 6.4.0
PyQt6-WebEngine-Qt6: 6.4.3
pyqtgraph: 0.13.3
python-dateutil: 2.8.2
pytz: 2023.3
pyzmq: 25.0.2
qtconsole: 5.4.0
QtPy: 2.3.1
RandomWords: 0.4.0
requests: 2.28.2
scipy: 1.9.3
Send2Trash: 1.8.2
SEQCROW: 1.8.8
setuptools: 67.4.0
sfftk-rw: 0.7.3
six: 1.16.0
snowballstemmer: 2.2.0
sortedcontainers: 2.4.0
soupsieve: 2.4.1
sphinx: 6.1.3
sphinx-autodoc-typehints: 1.22
sphinxcontrib-applehelp: 1.0.4
sphinxcontrib-blockdiag: 3.0.0
sphinxcontrib-devhelp: 1.0.2
sphinxcontrib-htmlhelp: 2.0.1
sphinxcontrib-jsmath: 1.0.1
sphinxcontrib-qthelp: 1.0.3
sphinxcontrib-serializinghtml: 1.1.5
stack-data: 0.6.2
tables: 3.7.0
tcia-utils: 1.2.0
tifffile: 2022.10.10
tinyarray: 1.2.4
tomli: 2.0.1
tornado: 6.3.1
traitlets: 5.9.0
typing-extensions: 4.5.0
tzdata: 2023.3
urllib3: 1.26.15
wcwidth: 0.2.6
webcolors: 1.12
wheel: 0.38.4
wheel-filename: 1.4.1
widgetsnbextension: 4.0.7
zipp: 3.15.0
ChimeraX 1.6 on startup on Linux calls make current on the Qt QOpenGLContext without errors and then PyOpenGL says it can't get the current context. I've only ever seen this on Linux. It may be a Qt bug. Qt claims it created the OpenGL context and made it the current context without errors. Maybe on Linux it is not correctly checking if the context is valid. It could also be a graphics driver bug in Mesa. If it is the graphics driver it might be fixed by installing an AMD graphics driver.
My only suggestions is to use the current ChimeraX 1.8 which uses a newer version of Qt (version 6.6 instead of 6.4 in your ChimeraX 1.6).