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ImportError: cannot import name 'IVtkOCC_Shape' from 'OCP.IVtkOCC' when importing CadQuery on Windows #2112
Description
Hello,
I'm experiencing an issue when importing CadQuery in Python using Visual Studio Code on Windows.
When running a simple import cadquery statement, Python raises an ImportError related to the OCP.IVtkOCC module.
I would appreciate some help identifying the cause and finding a reliable solution.
Environment
Operating system: Windows
IDE: Visual Studio Code (Jupyter notebook)
Python version: 3.14 (shown in the traceback)
Installation method: Python packages installed in the Python environment
Code to reproduce
import cadquery as cq
print(cq.version)
Error message
ImportError
Traceback (most recent call last)
Cell In[3], line 1
----> 1 import cadquery as cq
2 print(cq.version)
File ...\Python314\Lib\site-packages\cadquery_init_.py:11
10 from .occ_impl.geom import Plane, BoundBox, Vector, Matrix, Location
---> 11 from .occ_impl.shapes import (
File ...\Python314\Lib\site-packages\cadquery\occ_impl\shapes.py:297
294 from OCP.BRepProj import BRepProj_Projection
---> 297 from OCP.IVtkOCC import IVtkOCC_Shape, IVtkOCC_ShapeMesher
298 from OCP.IVtkVTK import IVtkVTK_ShapeData
ImportError: cannot import name 'IVtkOCC_Shape'
from 'OCP.IVtkOCC'
The error occurs before CadQuery can be imported successfully.
Expected behavior
CadQuery should import without errors, allowing me to create and manipulate 3D models.
Ethan
Activity
adam-urbanczyk commentedon Oct 15, 2026
Output of
pip listin your env plsethanlaboucheix commentedon Oct 16, 2026
I can't run
pip listbecause it returns a "Fatal error in launcher" message, indicating that Python cannot be found at its previous location.ethanlaboucheix commentedon Oct 16, 2026
pip list
Package Version
aiohappyeyeballs 2.7.1
aiohttp 3.14.5
aiosignal 1.4.0
asttokens 3.0.2
attrs 26.1.0
cadquery 2.8.0
cadquery-ocp 7.9.3.1.1
cadquery-ocp-proxy 7.9.3.1.1
casadi 3.8.1
colorama 0.4.6
comm 0.2.3
contourpy 1.4.0
cycler 0.12.1
debugpy 1.8.22
executing 2.3.0
ezdxf 1.4.5
fonttools 4.67.0
frozenlist 1.8.0
idna 3.20
ipykernel 7.4.0
ipython 9.17.1
ipython_pygments_lexers 1.1.1
jedi 0.20.1
jupyter_client 8.10.0
jupyter_core 5.9.1
kiwisolver 1.5.1
llvmlite 0.50.0
matplotlib 3.11.2
matplotlib-inline 0.2.2
more-itertools 11.2.1
msgpack 1.2.3
multidict 7.1.0
multimethod 1.12
nest-asyncio2 1.7.4
nlopt 2.11.0
numba 0.68.0
numpy 2.5.4
packaging 26.3
parso 0.8.7
pillow 12.3.0
pip 24.3.1
platformdirs 4.13.3
prompt_toolkit 3.0.53
propcache 0.5.4
psutil 7.2.2
pure_eval 0.2.4
Pygments 2.21.0
pyparsing 3.3.3
python-dateutil 2.9.0.post0
PyYAML 6.0.3
pyzmq 27.2.0
runtype 0.5.3
scipy 1.18.1
six 1.17.0
stack-data 0.6.3
tornado 6.5.10
traitlets 5.16.1
trame 4.0.0
trame-client 4.1.4
trame-common 1.2.9
trame-components 2.5.0
trame-server 4.1.0
trame-vtk 2.11.17
trame-vuetify 3.3.0
typing_extensions 4.16.0
vtk 9.6.2
wcwidth 0.9.2
wslink 2.6.0
yarl 1.25.1
jmwright commentedon Oct 20, 2026
@ethanlaboucheix Is this a fresh environment, or did you upgrade?