ModuleNotFoundError: No module named 'OCP'

[mwlandolsi]

During initialization the error "No module named 'OCP'" occurred in freecad.DFM
04:41:13 --------------------------------------------------------------------------------
04:41:13 Traceback (most recent call last):
File "", line 377, in InitApplications
File "/usr/lib/python3.13/importlib/init.py", line 88, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "", line 1395, in _gcd_import
File "", line 1360, in _find_and_load
File "", line 1331, in _find_and_load_unlocked
File "", line 935, in _load_unlocked
File "", line 1023, in exec_module
File "", line 488, in _call_with_frames_removed
File "/home/wissem/.var/app/org.freecad.FreeCAD/data/FreeCAD/v1-1/Mod/DFM/./freecad/DFM/init_gui.py", line 7, in
from .gui import task_setup, task_show_normals, process_library
File "/home/ME_USER/.var/app/org.freecad.FreeCAD/data/FreeCAD/v1-1/Mod/DFM/./freecad/DFM/gui/task_setup.py", line 13, in
from OCP.gp import gp_Dir
ModuleNotFoundError: No module named 'OCP'

[ryankembrey]

Hi @mwlandolsi , cadquery-ocp is a decency of the dfm workbench, and was only added to the list of dependencies that can be automatically installed a couple days ago. You may find uninstalling and reinstalling fix your problem. If it does, let me know and I'll close the issue, thanks.

[mwlandolsi]

Thanks for your reply, After trying to reinstall the WB, I got the following message :

This addon requires Python packages that are not installed, and cannot be installed automatically. To use this addon you must install the following Python packages manually:
cadquery-ocp
To ignore this error and install anyway, press OK.

I am using the following FreeCAD version on linux Mint 22.3:
OS: KDE Flatpak runtime (X-Cinnamon/cinnamon/xcb)
Architecture: x86_64
Version: 1.1.1.44874 (Git)
Build date: 2026/04/14 22:09:59
Build type: Release
Branch: (HEAD detached at 1.1.1)
Hash: 0108fd4b4850cc46e625b60e53cea7a7bbe69f8d
Python 3.13.13, Qt 6.10.3, Coin 4.0.8, Vtk 9.4.2, boost 1_86, Eigen3 3.4.1, PySide 6.10.3
shiboken 6.10.3, SMESH 7.7.1.0, xerces-c 3.3.0, IfcOpenShell 0.0.0, OCC 7.8.1
Locale: English/United States (en_US)
Navigation Style/Orbit Style/Rotation Mode: Blender/Rounded Arcball/Window center
Stylesheet/Theme/QtStyle: FreeCAD.qss/FreeCAD Dark/
Logical DPI/Physical DPI/Pixel Ratio: 96/141.585/1
Installed mods:

• HistoryWorkbench 0.1.0
• sheetmetal 0.8.21
• Cables 0.3.6
• frame 0.1.1
• CurvedShapes 1.0.15
• Curves 0.6.72
• fasteners 0.5.64
• StandardBeams 1.0.0
• ThreadWorkbench 0.3.1
• Estimate 0.1.5
• Telemetry 1.0.6
• DFM 0.1.14