Surface computation: cannot convert float NaN to integer

[chimerax-bug-report@…]

The following bug report has been submitted:
Platform:        macOS-10.16-x86_64-i386-64bit
ChimeraX Version: 1.4 (2022-06-03 23:39:42 UTC)
Description
(Describe the actions that caused this problem to occur here)

Log:
UCSF ChimeraX version: 1.4 (2022-06-03)  
© 2016-2022 Regents of the University of California. All rights reserved.  
How to cite UCSF ChimeraX  

> open
> /Volumes/brennecke/Liudmila/Rhino_AF/P_Rhino/P_Rhino_unrelaxed_rank_3_model_5_seed0.pdb

Chain information for P_Rhino_unrelaxed_rank_3_model_5_seed0.pdb #1  
---  
Chain | Description  
A | No description available  
  

> open
> /Users/liudmila.protsenko/Documents/OSCs_rescue_experiments_all_data/AF_Julia_results/Mael_vs_Nxf2_unrelaxed_rank_1_model_5_seed0.pdb

Chain information for Mael_vs_Nxf2_unrelaxed_rank_1_model_5_seed0.pdb #2  
---  
Chain | Description  
B | No description available  
C | No description available  
  
Drag select of 1757 residues  

> select add #2

13967 atoms, 10663 bonds, 1757 residues, 2 models selected  

> select add #1

13967 atoms, 14257 bonds, 1757 residues, 2 models selected  

> hide #2 models

> hide #1 models

> select subtract #1

10431 atoms, 10663 bonds, 1300 residues, 1 model selected  

> select subtract #2

Nothing selected  

> show #1 models

> show #1 atoms

[Repeated 2 time(s)]

> show #1 cartoons

> show #1 surfaces

Traceback (most recent call last):  
File
"/Applications/ChimeraX-1.4.app/Contents/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-
packages/chimerax/toolbar/tool.py", line 205, in callback  
bundle_info.run_provider(session, name, session.toolbar,
display_name=display_name)  
File
"/Applications/ChimeraX-1.4.app/Contents/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-
packages/chimerax/core/toolshed/info.py", line 386, in run_provider  
return api._api_caller.run_provider(api, session, name, mgr, **kw)  
File
"/Applications/ChimeraX-1.4.app/Contents/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-
packages/chimerax/core/toolshed/__init__.py", line 1286, in run_provider  
return cls._get_func(api, "run_provider")(session, name, mgr, **kw)  
File
"/Applications/ChimeraX-1.4.app/Contents/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-
packages/chimerax/shortcuts/__init__.py", line 52, in run_provider  
shortcuts.run_provider(session, name)  
File
"/Applications/ChimeraX-1.4.app/Contents/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-
packages/chimerax/shortcuts/shortcuts.py", line 1334, in run_provider  
keyboard_shortcuts(session).try_shortcut(name)  
File
"/Applications/ChimeraX-1.4.app/Contents/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-
packages/chimerax/shortcuts/shortcuts.py", line 390, in try_shortcut  
self.run_shortcut(keys)  
File
"/Applications/ChimeraX-1.4.app/Contents/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-
packages/chimerax/shortcuts/shortcuts.py", line 408, in run_shortcut  
sc.run(self.session, status = self._enabled)  
File
"/Applications/ChimeraX-1.4.app/Contents/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-
packages/chimerax/shortcuts/shortcuts.py", line 327, in run  
f(s)  
File
"/Applications/ChimeraX-1.4.app/Contents/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-
packages/chimerax/shortcuts/shortcuts.py", line 569, in run_expanded_command  
run(session, cmd)  
File
"/Applications/ChimeraX-1.4.app/Contents/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-
packages/chimerax/shortcuts/shortcuts.py", line 512, in run  
run_command(session, command, **kw)  
File
"/Applications/ChimeraX-1.4.app/Contents/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-
packages/chimerax/core/commands/run.py", line 38, in run  
results = command.run(text, log=log, return_json=return_json)  
File
"/Applications/ChimeraX-1.4.app/Contents/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-
packages/chimerax/core/commands/cli.py", line 2897, in run  
result = ci.function(session, **kw_args)  
File
"/Applications/ChimeraX-1.4.app/Contents/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-
packages/chimerax/std_commands/show.py", line 47, in show  
show_surfaces(session, objects, only, undo_state)  
File
"/Applications/ChimeraX-1.4.app/Contents/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-
packages/chimerax/std_commands/show.py", line 154, in show_surfaces  
surface(session, extra_atoms)  
File
"/Applications/ChimeraX-1.4.app/Contents/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-
packages/chimerax/surface/surfacecmds.py", line 162, in surface  
threadq.apply_to_list(_calculate_surface, args, nthread)  
File
"/Applications/ChimeraX-1.4.app/Contents/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-
packages/chimerax/core/threadq.py", line 47, in apply_to_list  
return [func(*a) for a in args]  
File
"/Applications/ChimeraX-1.4.app/Contents/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-
packages/chimerax/core/threadq.py", line 47, in <listcomp>  
return [func(*a) for a in args]  
File
"/Applications/ChimeraX-1.4.app/Contents/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-
packages/chimerax/surface/surfacecmds.py", line 195, in _calculate_surface  
surf.calculate_surface_geometry()  
File
"/Applications/ChimeraX-1.4.app/Contents/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-
packages/chimerax/atomic/molsurf.py", line 232, in calculate_surface_geometry  
va, na, ta = surface.ses_surface_geometry(xyz, r, self.probe_radius,
self.grid_spacing)  
File
"/Applications/ChimeraX-1.4.app/Contents/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-
packages/chimerax/surface/gridsurf.py", line 29, in ses_surface_geometry  
shape = [int(ceil((xyz_max[a] - xyz_min[a] + 2*pad) / s))  
File
"/Applications/ChimeraX-1.4.app/Contents/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-
packages/chimerax/surface/gridsurf.py", line 29, in <listcomp>  
shape = [int(ceil((xyz_max[a] - xyz_min[a] + 2*pad) / s))  
ValueError: cannot convert float NaN to integer  
  

Populating font family aliases took 1987 ms. Replace uses of missing font
family ".AppleSystemUIFont" with one that exists to avoid this cost.  

ValueError: cannot convert float NaN to integer  
  
File
"/Applications/ChimeraX-1.4.app/Contents/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-
packages/chimerax/surface/gridsurf.py", line 29, in  
shape = [int(ceil((xyz_max[a] - xyz_min[a] + 2*pad) / s))  
  
See log for complete Python traceback.  
  




OpenGL version: 4.1 INTEL-16.5.8
OpenGL renderer: Intel(R) HD Graphics 6000
OpenGL vendor: Intel Inc.

Python: 3.9.11
Locale: UTF-8
Qt version: PyQt6 6.3.0, Qt 6.3.0
Qt runtime version: 6.3.0
Qt platform: cocoa
Hardware:

    Hardware Overview:

      Model Name: MacBook Air
      Model Identifier: MacBookAir7,2
      Processor Name: Dual-Core Intel Core i5
      Processor Speed: 1,6 GHz
      Number of Processors: 1
      Total Number of Cores: 2
      L2 Cache (per Core): 256 KB
      L3 Cache: 3 MB
      Hyper-Threading Technology: Enabled
      Memory: 8 GB
      System Firmware Version: 428.60.3.0.0
      SMC Version (system): 2.27f2

Software:

    System Software Overview:

      System Version: macOS 11.6.4 (20G417)
      Kernel Version: Darwin 20.6.0
      Time since boot: 36 days 3:45

Graphics/Displays:

    Intel HD Graphics 6000:

      Chipset Model: Intel HD Graphics 6000
      Type: GPU
      Bus: Built-In
      VRAM (Dynamic, Max): 1536 MB
      Vendor: Intel
      Device ID: 0x1626
      Revision ID: 0x0009
      Metal Family: Supported, Metal GPUFamily macOS 1
      Displays:
        Color LCD:
          Display Type: LCD
          Resolution: 1440 x 900 (Widescreen eXtended Graphics Array Plus)
          UI Looks like: 1440 x 900
          Framebuffer Depth: 24-Bit Color (ARGB8888)
          Main Display: Yes
          Mirror: Off
          Online: Yes
          Automatically Adjust Brightness: Yes
          Connection Type: Internal


Installed Packages:
    alabaster: 0.7.12
    appdirs: 1.4.4
    appnope: 0.1.3
    Babel: 2.10.1
    backcall: 0.2.0
    blockdiag: 3.0.0
    certifi: 2021.10.8
    cftime: 1.6.0
    charset-normalizer: 2.0.12
    ChimeraX-AddCharge: 1.2.3
    ChimeraX-AddH: 2.1.11
    ChimeraX-AlignmentAlgorithms: 2.0
    ChimeraX-AlignmentHdrs: 3.2.1
    ChimeraX-AlignmentMatrices: 2.0
    ChimeraX-Alignments: 2.4.3
    ChimeraX-AlphaFold: 1.0
    ChimeraX-AltlocExplorer: 1.0.2
    ChimeraX-AmberInfo: 1.0
    ChimeraX-Arrays: 1.0
    ChimeraX-Atomic: 1.39.1
    ChimeraX-AtomicLibrary: 7.0
    ChimeraX-AtomSearch: 2.0.1
    ChimeraX-AxesPlanes: 2.1
    ChimeraX-BasicActions: 1.1
    ChimeraX-BILD: 1.0
    ChimeraX-BlastProtein: 2.1.1
    ChimeraX-BondRot: 2.0
    ChimeraX-BugReporter: 1.0
    ChimeraX-BuildStructure: 2.7
    ChimeraX-Bumps: 1.0
    ChimeraX-BundleBuilder: 1.1
    ChimeraX-ButtonPanel: 1.0
    ChimeraX-CageBuilder: 1.0
    ChimeraX-CellPack: 1.0
    ChimeraX-Centroids: 1.2
    ChimeraX-ChemGroup: 2.0
    ChimeraX-Clashes: 2.2.4
    ChimeraX-ColorActions: 1.0
    ChimeraX-ColorGlobe: 1.0
    ChimeraX-ColorKey: 1.5.1
    ChimeraX-CommandLine: 1.2.3
    ChimeraX-ConnectStructure: 2.0.1
    ChimeraX-Contacts: 1.0
    ChimeraX-Core: 1.4
    ChimeraX-CoreFormats: 1.1
    ChimeraX-coulombic: 1.3.2
    ChimeraX-Crosslinks: 1.0
    ChimeraX-Crystal: 1.0
    ChimeraX-CrystalContacts: 1.0
    ChimeraX-DataFormats: 1.2.2
    ChimeraX-Dicom: 1.1
    ChimeraX-DistMonitor: 1.1.5
    ChimeraX-Dssp: 2.0
    ChimeraX-EMDB-SFF: 1.0
    ChimeraX-ExperimentalCommands: 1.0
    ChimeraX-FileHistory: 1.0
    ChimeraX-FunctionKey: 1.0
    ChimeraX-Geometry: 1.2
    ChimeraX-gltf: 1.0
    ChimeraX-Graphics: 1.1
    ChimeraX-Hbonds: 2.1.2
    ChimeraX-Help: 1.2
    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
    ChimeraX-Label: 1.1.1
    ChimeraX-ListInfo: 1.1.1
    ChimeraX-Log: 1.1.5
    ChimeraX-LookingGlass: 1.1
    ChimeraX-Maestro: 1.8.1
    ChimeraX-Map: 1.1
    ChimeraX-MapData: 2.0
    ChimeraX-MapEraser: 1.0
    ChimeraX-MapFilter: 2.0
    ChimeraX-MapFit: 2.0
    ChimeraX-MapSeries: 2.1
    ChimeraX-Markers: 1.0
    ChimeraX-Mask: 1.0
    ChimeraX-MatchMaker: 2.0.6
    ChimeraX-MDcrds: 2.6
    ChimeraX-MedicalToolbar: 1.0.1
    ChimeraX-Meeting: 1.0
    ChimeraX-MLP: 1.1
    ChimeraX-mmCIF: 2.7
    ChimeraX-MMTF: 2.1
    ChimeraX-Modeller: 1.5.5
    ChimeraX-ModelPanel: 1.3.2
    ChimeraX-ModelSeries: 1.0
    ChimeraX-Mol2: 2.0
    ChimeraX-Morph: 1.0
    ChimeraX-MouseModes: 1.1
    ChimeraX-Movie: 1.0
    ChimeraX-Neuron: 1.0
    ChimeraX-Nucleotides: 2.0.2
    ChimeraX-OpenCommand: 1.9
    ChimeraX-PDB: 2.6.6
    ChimeraX-PDBBio: 1.0
    ChimeraX-PDBLibrary: 1.0.2
    ChimeraX-PDBMatrices: 1.0
    ChimeraX-PickBlobs: 1.0
    ChimeraX-Positions: 1.0
    ChimeraX-PresetMgr: 1.1
    ChimeraX-PubChem: 2.1
    ChimeraX-ReadPbonds: 1.0.1
    ChimeraX-Registration: 1.1
    ChimeraX-RemoteControl: 1.0
    ChimeraX-ResidueFit: 1.0
    ChimeraX-RestServer: 1.1
    ChimeraX-RNALayout: 1.0
    ChimeraX-RotamerLibMgr: 2.0.1
    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
    ChimeraX-Segger: 1.0
    ChimeraX-Segment: 1.0
    ChimeraX-SelInspector: 1.0
    ChimeraX-SeqView: 2.6
    ChimeraX-Shape: 1.0.1
    ChimeraX-Shell: 1.0
    ChimeraX-Shortcuts: 1.1
    ChimeraX-ShowAttr: 1.0
    ChimeraX-ShowSequences: 1.0
    ChimeraX-SideView: 1.0
    ChimeraX-Smiles: 2.1
    ChimeraX-SmoothLines: 1.0
    ChimeraX-SpaceNavigator: 1.0
    ChimeraX-StdCommands: 1.8
    ChimeraX-STL: 1.0
    ChimeraX-Storm: 1.0
    ChimeraX-StructMeasure: 1.0.1
    ChimeraX-Struts: 1.0.1
    ChimeraX-Surface: 1.0
    ChimeraX-SwapAA: 2.0
    ChimeraX-SwapRes: 2.1.1
    ChimeraX-TapeMeasure: 1.0
    ChimeraX-Test: 1.0
    ChimeraX-Toolbar: 1.1.1
    ChimeraX-ToolshedUtils: 1.2.1
    ChimeraX-Tug: 1.0
    ChimeraX-UI: 1.18.3
    ChimeraX-uniprot: 2.2
    ChimeraX-UnitCell: 1.0
    ChimeraX-ViewDockX: 1.1.2
    ChimeraX-VIPERdb: 1.0
    ChimeraX-Vive: 1.1
    ChimeraX-VolumeMenu: 1.0
    ChimeraX-VTK: 1.0
    ChimeraX-WavefrontOBJ: 1.0
    ChimeraX-WebCam: 1.0
    ChimeraX-WebServices: 1.1.0
    ChimeraX-Zone: 1.0
    colorama: 0.4.4
    cxservices: 1.2
    cycler: 0.11.0
    Cython: 0.29.26
    debugpy: 1.6.0
    decorator: 5.1.1
    docutils: 0.17.1
    entrypoints: 0.4
    filelock: 3.4.2
    fonttools: 4.33.3
    funcparserlib: 1.0.0
    grako: 3.16.5
    h5py: 3.7.0
    html2text: 2020.1.16
    idna: 3.3
    ihm: 0.27
    imagecodecs: 2021.11.20
    imagesize: 1.3.0
    ipykernel: 6.6.1
    ipython: 7.31.1
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    jedi: 0.18.1
    Jinja2: 3.0.3
    jupyter-client: 7.1.0
    jupyter-core: 4.10.0
    kiwisolver: 1.4.2
    line-profiler: 3.4.0
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    lz4: 3.1.10
    MarkupSafe: 2.1.1
    matplotlib: 3.5.1
    matplotlib-inline: 0.1.3
    msgpack: 1.0.3
    nest-asyncio: 1.5.5
    netCDF4: 1.5.8
    networkx: 2.6.3
    numexpr: 2.8.1
    numpy: 1.22.1
    openvr: 1.16.802
    packaging: 21.0
    ParmEd: 3.4.3
    parso: 0.8.3
    pexpect: 4.8.0
    pickleshare: 0.7.5
    Pillow: 9.0.1
    pip: 21.3.1
    pkginfo: 1.8.2
    prompt-toolkit: 3.0.29
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    pycollada: 0.7.2
    pydicom: 2.2.2
    Pygments: 2.11.2
    PyOpenGL: 3.1.5
    PyOpenGL-accelerate: 3.1.5
    pyparsing: 3.0.9
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    PyQt6-Qt6: 6.3.0
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    Sphinx: 4.3.2
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    sphinxcontrib-blockdiag: 3.0.0
    sphinxcontrib-devhelp: 1.0.2
    sphinxcontrib-htmlhelp: 2.0.0
    sphinxcontrib-jsmath: 1.0.1
    sphinxcontrib-qthelp: 1.0.3
    sphinxcontrib-serializinghtml: 1.1.5
    suds-community: 1.0.0
    tables: 3.7.0
    tifffile: 2021.11.2
    tinyarray: 1.2.4
    tornado: 6.1
    traitlets: 5.1.1
    urllib3: 1.26.9
    wcwidth: 0.2.5
    webcolors: 1.11.1
    wheel: 0.37.1
    wheel-filename: 1.3.0

[Tom Goddard]

Probable bad PDB file with NaN atom coordinates.

User opened a file P_Rhino_unrelaxed_rank_3_model_5_seed0.pdb that apparently had NaN coordinates. Looks like it was an alphafold prediction from the file name. OpenMM minimization done on such predictions can produce NaN coordinates. Unfortunately in tests of our PDB file reader about a year ago it read "nan" from the text file without an error and assigned coordinates to be NaN values. Not sure if it still does that.

Tested again. It is still the case that "nan" in the PDB file coordinates is read without any warning and will of course cause havoc. Not sure it is worth checking for this since it will slow down reading of all PDB files for a very rare problem. I made a separate ticket to detect and warn about NaN coordinates, #8030.