DiffFit: No module named 'torch._prims_common'

[chimerax-bug-report@…]

The following bug report has been submitted:
Platform:        Windows-10-10.0.26100
ChimeraX Version: 1.10 (2025-06-26 08:57:52 UTC)
Description
Replace this text with list of actions that caused this problem to occur

Log:
UCSF ChimeraX version: 1.10 (2025-06-26)  
© 2016-2025 Regents of the University of California. All rights reserved.  
How to cite UCSF ChimeraX  

> open "C:\\\Users\\\A K
> D\\\Documents\\\EthA_cryoEM\\\DockInMap_6\\\placed_model.pdb"

Summary of feedback from opening C:\\\Users\\\A K
D\\\Documents\\\EthA_cryoEM\\\DockInMap_6\\\placed_model.pdb  
---  
warning | Ignored bad PDB record found on line 23412  
  
Chain information for placed_model.pdb #1  
---  
Chain | Description  
A B C D E F | No description available  
  

> open "C:/Users/A K D/Documents/EthA_cryoEM/Maps/Flipped/P5-J52-sharp
> map.mrc"

Opened P5-J52-sharp map.mrc as #2, grid size 512,512,512, pixel 0.8, shown at
level 0.0424, step 2, values float32  

> hide atoms

> show cartoons

Computing secondary structure  

> surface dust #2 size 8

> volume #2 step 1

> volume #2 level 0.078

> volume #2 level 0.1212

> volume #2 level 0.1619

> volume style mesh

> style stick

Changed 23400 atom styles  

> show atoms

> volume #2 level 0.05003

> select add #1

23400 atoms, 24006 bonds, 2934 residues, 1 model selected  

> molmap #1 10

Opened placed_model.pdb map 10 as #3, grid size 59,62,53, pixel 3.33, shown at
level 0.071, step 1, values float32  

> maskChains #2 surface #3

maskChains is provided by the uninstalled bundle maskChains versions 1.1 – 1.4  

> hide #!3 models

> show #!3 models

> maskChains #2 #3 fullmap true

maskChains is provided by the uninstalled bundle maskChains versions 1.1 – 1.4  
Downloading bundle ChimeraX_maskChains-1.4-py3-none-any.whl  

> maskmap #2 surface #3 fullmap true

Unknown command: maskmap #2 surface #3 fullmap true  

> hide #!3 models

> select /B:231

9 atoms, 8 bonds, 1 residue, 1 model selected  

> view sel

Downloading bundle ChimeraX_maskChains-1.4-py3-none-any.whl  
Installed ChimeraX-QScore (1.1)  
Installed ChimeraX-maskChains (1.4)  
Downloading bundle DiffFit-0.7.0-py3-none-any.whl  
Installed DiffFit (0.7.0)  

> ui tool show DiffFit

Traceback (most recent call last):  
File "C:\Program Files\ChimeraX 1.10\bin\Lib\site-
packages\chimerax\core\toolshed\info.py", line 571, in start_tool  
ti = api._api_caller.start_tool(api, session, self, tool_info)  
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
File "C:\Program Files\ChimeraX 1.10\bin\Lib\site-
packages\chimerax\core\toolshed\\__init__.py", line 1458, in start_tool  
return cls._get_func(api, "start_tool")(session, bi, ti)  
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
File "C:\Users\A K D\AppData\Local\UCSF\ChimeraX\1.10\Python311\site-
packages\chimerax\difffit\\__init__.py", line 29, in start_tool  
from . import tool  
File "C:\Users\A K D\AppData\Local\UCSF\ChimeraX\1.10\Python311\site-
packages\chimerax\difffit\tool.py", line 37, in <module>  
from .DiffAtomComp import diff_atom_comp, cluster_and_sort_sqd_fast, diff_fit,
conv_volume, numpy2tensor, \  
File "C:\Users\A K D\AppData\Local\UCSF\ChimeraX\1.10\Python311\site-
packages\chimerax\difffit\DiffAtomComp.py", line 9, in <module>  
import torch.nn.functional as F  
File "C:\Users\A K D\AppData\Local\UCSF\ChimeraX\1.10\Python311\site-
packages\torch\nn\\__init__.py", line 1, in <module>  
from .modules import * # noqa: F403  
^^^^^^^^^^^^^^^^^^^^^^  
File "C:\Users\A K D\AppData\Local\UCSF\ChimeraX\1.10\Python311\site-
packages\torch\nn\modules\\__init__.py", line 1, in <module>  
from .module import Module  
File "C:\Users\A K D\AppData\Local\UCSF\ChimeraX\1.10\Python311\site-
packages\torch\nn\modules\module.py", line 8, in <module>  
from torch._prims_common import DeviceLikeType  
ModuleNotFoundError: No module named 'torch._prims_common'  
  
During handling of the above exception, another exception occurred:  
  
Traceback (most recent call last):  
File "C:\Program Files\ChimeraX 1.10\bin\Lib\site-
packages\chimerax\ui\gui.py", line 1891, in <lambda>  
run(ses, "ui tool show %s" % StringArg.unparse(tool_name)))  
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
File "C:\Program Files\ChimeraX 1.10\bin\Lib\site-
packages\chimerax\core\commands\run.py", line 49, in run  
results = command.run(text, log=log, return_json=return_json)  
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
File "C:\Program Files\ChimeraX 1.10\bin\Lib\site-
packages\chimerax\core\commands\cli.py", line 3221, in run  
result = ci.function(session, **kw_args)  
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
File "C:\Program Files\ChimeraX 1.10\bin\Lib\site-
packages\chimerax\ui\cmd.py", line 219, in ui_tool_show  
return bi.start_tool(session, name)  
^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
File "C:\Program Files\ChimeraX 1.10\bin\Lib\site-
packages\chimerax\core\toolshed\info.py", line 578, in start_tool  
raise ToolshedError(  
chimerax.core.toolshed.ToolshedError: start_tool() failed for tool DiffFit in
bundle DiffFit:  
No module named 'torch._prims_common'  
  
chimerax.core.toolshed.ToolshedError: start_tool() failed for tool DiffFit in
bundle DiffFit:  
No module named 'torch._prims_common'  
  
File "C:\Program Files\ChimeraX 1.10\bin\Lib\site-
packages\chimerax\core\toolshed\info.py", line 578, in start_tool  
raise ToolshedError(  
  
See log for complete Python traceback.  
  




OpenGL version: 3.3.0 - Build 31.0.101.2115
OpenGL renderer: Intel(R) UHD Graphics 630
OpenGL vendor: Intel

Python: 3.11.4
Locale: en_IN.cp1252
Qt version: PyQt6 6.8.1, Qt 6.8.2
Qt runtime version: 6.8.2
Qt platform: windows

Manufacturer: HP
Model: HP ProDesk 600 G6 Microtower PC
OS: Microsoft Windows 11 Pro (Build 26100)
Memory: 8,354,234,368
MaxProcessMemory: 137,438,953,344
CPU: 12 Intel(R) Core(TM) i5-10500 CPU @ 3.10GHz
OSLanguage: en-US

Installed Packages:
    alabaster: 1.0.0
    appdirs: 1.4.4
    asttokens: 3.0.0
    auditwheel: 6.4.0
    babel: 2.17.0
    beautifulsoup4: 4.13.3
    biopython: 1.83
    blockdiag: 3.0.0
    blosc2: 3.5.0
    build: 1.2.2.post1
    certifi: 2025.6.15
    cftime: 1.6.4.post1
    charset-normalizer: 3.4.2
    ChimeraX-AddCharge: 1.5.19
    ChimeraX-AddH: 2.2.7
    ChimeraX-AlignmentAlgorithms: 2.0.2
    ChimeraX-AlignmentHdrs: 3.6.1
    ChimeraX-AlignmentMatrices: 2.1
    ChimeraX-Alignments: 2.20.2
    ChimeraX-AlphaFold: 1.0.1
    ChimeraX-AltlocExplorer: 1.1.2
    ChimeraX-AmberInfo: 1.0
    ChimeraX-Aniso: 1.1.4
    ChimeraX-Arrays: 1.1
    ChimeraX-Atomic: 1.60.7
    ChimeraX-AtomicLibrary: 14.1.18
    ChimeraX-AtomSearch: 2.0.1
    ChimeraX-AxesPlanes: 2.4
    ChimeraX-BasicActions: 1.1.3
    ChimeraX-BILD: 1.0
    ChimeraX-BlastProtein: 3.0.0
    ChimeraX-Boltz: 1.0
    ChimeraX-BondRot: 2.0.4
    ChimeraX-BugReporter: 1.0.2
    ChimeraX-BuildStructure: 2.13.1
    ChimeraX-Bumps: 1.0
    ChimeraX-BundleBuilder: 1.5.1
    ChimeraX-ButtonPanel: 1.0.1
    ChimeraX-CageBuilder: 1.0.1
    ChimeraX-CellPack: 1.0
    ChimeraX-Centroids: 1.4
    ChimeraX-ChangeChains: 1.1
    ChimeraX-CheckWaters: 1.5
    ChimeraX-ChemGroup: 2.0.2
    ChimeraX-Clashes: 2.3
    ChimeraX-ColorActions: 1.0.5
    ChimeraX-ColorGlobe: 1.0
    ChimeraX-ColorKey: 1.5.8
    ChimeraX-CommandLine: 1.3
    ChimeraX-ConnectStructure: 2.0.1
    ChimeraX-Contacts: 1.0.1
    ChimeraX-Core: 1.10
    ChimeraX-CoreFormats: 1.2
    ChimeraX-coulombic: 1.4.5
    ChimeraX-Crosslinks: 1.0
    ChimeraX-Crystal: 1.0
    ChimeraX-CrystalContacts: 1.0.1
    ChimeraX-DataFormats: 1.2.4
    ChimeraX-Dicom: 1.2.7
    ChimeraX-DistMonitor: 1.4.2
    ChimeraX-DockPrep: 1.1.4
    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: 1.4.1
    ChimeraX-Hbonds: 2.5.1
    ChimeraX-Help: 1.3
    ChimeraX-HKCage: 1.3
    ChimeraX-IHM: 1.1
    ChimeraX-ImageFormats: 1.2
    ChimeraX-IMOD: 1.0
    ChimeraX-IO: 1.0.3
    ChimeraX-ItemsInspection: 1.0.1
    ChimeraX-IUPAC: 1.0
    ChimeraX-KVFinder: 1.6.2
    ChimeraX-Label: 1.1.14
    ChimeraX-ListInfo: 1.2.2
    ChimeraX-Log: 1.2
    ChimeraX-LookingGlass: 1.1
    ChimeraX-Maestro: 1.9.1
    ChimeraX-Map: 1.3
    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-maskChains: 1.4
    ChimeraX-MatchMaker: 2.2.2
    ChimeraX-MCopy: 1.0
    ChimeraX-MDcrds: 2.10.1
    ChimeraX-MedicalToolbar: 1.1
    ChimeraX-Meeting: 1.0.1
    ChimeraX-MLP: 1.1.1
    ChimeraX-mmCIF: 2.16
    ChimeraX-MMTF: 2.2
    ChimeraX-ModelArchive: 1.0
    ChimeraX-Modeller: 1.5.19
    ChimeraX-ModelPanel: 1.5.1
    ChimeraX-ModelSeries: 1.0.1
    ChimeraX-Mol2: 2.0.3
    ChimeraX-Mole: 1.0
    ChimeraX-Morph: 1.0.2
    ChimeraX-MouseModes: 1.2
    ChimeraX-Movie: 1.0
    ChimeraX-MutationScores: 1.0
    ChimeraX-Neuron: 1.0
    ChimeraX-Nifti: 1.2
    ChimeraX-NMRSTAR: 1.0.2
    ChimeraX-NRRD: 1.2
    ChimeraX-Nucleotides: 2.0.3
    ChimeraX-OpenCommand: 1.14.1
    ChimeraX-OrthoPick: 1.0.1
    ChimeraX-PDB: 2.7.10
    ChimeraX-PDBBio: 1.0.1
    ChimeraX-PDBLibrary: 1.0.4
    ChimeraX-PDBMatrices: 1.0
    ChimeraX-PickBlobs: 1.0.1
    ChimeraX-Positions: 1.0
    ChimeraX-PresetMgr: 1.1.3
    ChimeraX-ProfileGrids: 1.1.2
    ChimeraX-PubChem: 2.2
    ChimeraX-QScore: 1.1
    ChimeraX-ReadPbonds: 1.0.1
    ChimeraX-Registration: 1.1.2
    ChimeraX-RemoteControl: 1.0
    ChimeraX-RenderByAttr: 1.6.3
    ChimeraX-RenumberResidues: 1.1
    ChimeraX-ResidueFit: 1.0.1
    ChimeraX-RestServer: 1.3.1
    ChimeraX-RNALayout: 1.0
    ChimeraX-RotamerLibMgr: 4.0
    ChimeraX-RotamerLibsDunbrack: 2.0
    ChimeraX-RotamerLibsDynameomics: 2.0
    ChimeraX-RotamerLibsRichardson: 2.0
    ChimeraX-SaveCommand: 1.5.1
    ChimeraX-SchemeMgr: 1.0
    ChimeraX-SDF: 2.0.3
    ChimeraX-Segger: 1.0
    ChimeraX-Segment: 1.0.1
    ChimeraX-Segmentations: 3.5.7
    ChimeraX-SelInspector: 1.0
    ChimeraX-SeqView: 2.17.1
    ChimeraX-Shape: 1.1
    ChimeraX-Shell: 1.0.1
    ChimeraX-Shortcuts: 1.2.1
    ChimeraX-ShowSequences: 1.0.3
    ChimeraX-SideView: 1.0.1
    ChimeraX-SimilarStructures: 1.0.1
    ChimeraX-Smiles: 2.1.2
    ChimeraX-SmoothLines: 1.0
    ChimeraX-SpaceNavigator: 1.0
    ChimeraX-StdCommands: 1.19.1
    ChimeraX-STL: 1.0.1
    ChimeraX-Storm: 1.0
    ChimeraX-StructMeasure: 1.2.1
    ChimeraX-Struts: 1.0.1
    ChimeraX-Surface: 1.0.1
    ChimeraX-SwapAA: 2.0.1
    ChimeraX-SwapRes: 2.5.2
    ChimeraX-TapeMeasure: 1.0
    ChimeraX-TaskManager: 1.0
    ChimeraX-Test: 1.0
    ChimeraX-Toolbar: 1.2.3
    ChimeraX-ToolshedUtils: 1.2.4
    ChimeraX-Topography: 1.0
    ChimeraX-ToQuest: 1.0
    ChimeraX-Tug: 1.0.1
    ChimeraX-UI: 1.45.2
    ChimeraX-Umap: 1.0
    ChimeraX-uniprot: 2.3.1
    ChimeraX-UnitCell: 1.0.1
    ChimeraX-ViewDockX: 1.4.4
    ChimeraX-VIPERdb: 1.0
    ChimeraX-Vive: 1.1
    ChimeraX-VolumeMenu: 1.0.1
    ChimeraX-vrml: 1.0
    ChimeraX-VTK: 1.0
    ChimeraX-WavefrontOBJ: 1.0
    ChimeraX-WebCam: 1.0.2
    ChimeraX-WebServices: 1.1.5
    ChimeraX-Zone: 1.0.1
    colorama: 0.4.6
    comm: 0.2.2
    comtypes: 1.4.10
    contourpy: 1.3.2
    coverage: 7.9.1
    cxservices: 1.2.3
    cycler: 0.12.1
    Cython: 3.0.12
    debugpy: 1.8.14
    decorator: 5.2.1
    DiffFit: 0.7.0
    docutils: 0.21.2
    executing: 2.2.0
    filelock: 3.18.0
    fonttools: 4.58.4
    fsspec: 2025.5.1
    funcparserlib: 2.0.0a0
    glfw: 2.9.0
    grako: 3.16.5
    h5py: 3.14.0
    html2text: 2024.2.26
    idna: 3.10
    ihm: 2.2
    imagecodecs: 2024.6.1
    imagesize: 1.4.1
    iniconfig: 2.1.0
    ipykernel: 6.29.5
    ipython: 8.26.0
    ipywidgets: 8.1.7
    jedi: 0.19.1
    Jinja2: 3.1.6
    jupyter_client: 8.6.3
    jupyter_core: 5.8.1
    jupyterlab_widgets: 3.0.15
    kiwisolver: 1.4.8
    line_profiler: 4.2.0
    lxml: 5.3.1
    lz4: 4.4.4
    MarkupSafe: 3.0.2
    matplotlib: 3.10.1
    matplotlib-inline: 0.1.7
    mpmath: 1.3.0
    mrcfile: 1.5.0
    msgpack: 1.1.0
    ndindex: 1.10.0
    nest-asyncio: 1.6.0
    netCDF4: 1.6.5
    networkx: 3.3
    nibabel: 5.2.0
    nptyping: 2.5.0
    numexpr: 2.11.0
    numpy: 1.26.4
    nvidia-cuda-cupti-cu12: 12.9.79
    nvidia-cuda-nvcc-cu12: 12.9.86
    nvidia-cuda-nvrtc-cu12: 12.9.86
    nvidia-cuda-runtime-cu12: 12.9.79
    nvidia-cufft-cu12: 11.4.1.4
    nvidia-nvjitlink-cu12: 12.9.86
    OpenMM: 8.2.0
    OpenMM-CUDA-12: 8.2.0
    openvr: 1.26.701
    packaging: 24.2
    ParmEd: 4.2.2
    parso: 0.8.4
    pep517: 0.13.1
    pickleshare: 0.7.5
    pillow: 10.4.0
    pip: 25.0.1
    pkginfo: 1.11.1
    platformdirs: 4.3.8
    pluggy: 1.6.0
    prompt_toolkit: 3.0.51
    psutil: 7.0.0
    pure_eval: 0.2.3
    py-cpuinfo: 9.0.0
    pycollada: 0.8
    pydicom: 2.4.4
    pyelftools: 0.32
    Pygments: 2.18.0
    pynmrstar: 3.3.5
    pynrrd: 1.0.0
    PyOpenGL: 3.1.9
    PyOpenGL-accelerate: 3.1.9
    pyopenxr: 1.1.4501
    pyparsing: 3.2.3
    pyproject_hooks: 1.2.0
    PyQt6-commercial: 6.8.1
    PyQt6-Qt6: 6.8.2
    PyQt6-WebEngine-commercial: 6.8.0
    PyQt6-WebEngine-Qt6: 6.8.2
    PyQt6_sip: 13.10.0
    pytest: 8.4.1
    pytest-cov: 6.2.1
    python-dateutil: 2.9.0.post0
    pytz: 2025.2
    pywin32: 310
    pyzmq: 27.0.0
    qtconsole: 5.5.2
    QtPy: 2.4.3
    qtshim: 1.1
    RandomWords: 0.4.0
    requests: 2.32.3
    roman-numerals-py: 3.1.0
    scipy: 1.14.0
    setuptools: 78.1.0
    sfftk-rw: 0.8.1
    six: 1.16.0
    snowballstemmer: 3.0.1
    sortedcontainers: 2.4.0
    soupsieve: 2.7
    Sphinx: 8.2.3
    sphinx-autodoc-typehints: 3.1.0
    sphinxcontrib-applehelp: 2.0.0
    sphinxcontrib-blockdiag: 3.0.0
    sphinxcontrib-devhelp: 2.0.0
    sphinxcontrib-htmlhelp: 2.1.0
    sphinxcontrib-jsmath: 1.0.1
    sphinxcontrib-qthelp: 2.0.0
    sphinxcontrib-serializinghtml: 2.0.0
    stack-data: 0.6.3
    superqt: 0.7.1
    sympy: 1.14.0
    tables: 3.10.2
    tcia_utils: 1.5.1
    tifffile: 2025.3.13
    tinyarray: 1.2.4
    torch: 2.2.1
    tornado: 6.5.1
    traitlets: 5.14.3
    typing_extensions: 4.14.0
    tzdata: 2025.2
    urllib3: 2.5.0
    wcwidth: 0.2.13
    webcolors: 24.11.1
    wheel: 0.45.1
    wheel-filename: 1.4.2
    widgetsnbextension: 4.0.14
    WMI: 1.5.1