shell() raises StdFail_NotDone for any sphere created on a Workplane whose
normal is not ±Z. The same sphere, in the same world pose, works fine when the rotation is
baked into the geometry instead of carried as a TopLoc_Location. Two conditions must both
hold: a located (not baked) shape, and a sphere that retains at least one pole.
To Reproduce
import cadquery as cq
cq.Workplane("XY").sphere(13).shell(-1) # OK
cq.Workplane("XZ").sphere(13).shell(-1) # StdFail_NotDoneBacktrace
File "<frozen importlib._bootstrap_external>", line 999, in exec_module
File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
File "/bug.py", line 4, in <module>
cq.Workplane("XZ").sphere(13).shell(-1)
File "/.venv/lib/python3.12/site-packages/cadquery/cq.py", line 1215, in shell
s = solidRef.shell(faces, thickness, kind=kind)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/.venv/lib/python3.12/site-packages/cadquery/occ_impl/shapes.py", line 3814, in shell
s1 = self.__class__(shell_builder.Shape()).Shells()[0].wrapped
^^^^^^^^^^^^^^^^^^^^^
OCP.OCP.StdFail.StdFail_NotDone: BRep_API: command not done
Environment
OS: Fedora 44
Was CadQuery installed using Conda?: No uv and pip where used
>uv pip list
❯ uv pip list
Package Version Editable project location
----------------------- ----------- -----------------------------------------
aiohappyeyeballs 2.7.1
aiohttp 3.14.3
aiosignal 1.4.0
asttokens 3.0.2
attrs 26.1.0
blinker 1.9.0
cachetools 5.5.2
cadquery 2.8.0
cadquery-ocp 7.9.3.1.1
cadquery-ocp-proxy 7.9.3.1.1
casadi 3.7.2
certifi 2026.7.22
charset-normalizer 3.4.9
click 8.4.2
comm 0.2.3
contourpy 1.3.3
cycler 0.12.1
dataclasses-json 0.6.7
debugpy 1.8.21
decorator 5.3.1
deprecated 1.3.1
executing 2.2.1
ezdxf 1.4.4
flask 3.1.3
flask-sock 0.7.0
fonttools 4.63.0
frozenlist 1.8.0
h11 0.16.0
idna 3.18
imagesize 2.0.0
ipykernel 7.3.0
ipython 9.15.0
ipython-pygments-lexers 1.1.1
itsdangerous 2.2.0
jedi 0.20.0
jinja2 3.1.6
jupyter-client 8.9.1
jupyter-core 5.9.1
kiwisolver 1.5.0
llvmlite 0.48.0
markupsafe 3.0.3
marshmallow 3.26.2
matplotlib 3.11.1
matplotlib-inline 0.2.2
more-itertools 11.1.0
msgpack 1.2.1
multidict 6.7.1
multimethod 1.12
mypy-extensions 1.1.0
nest-asyncio2 1.7.2
nlopt 2.11.0
numba 0.66.0
numpy 2.4.6
ocp-tessellate 3.4.1
ocp-vscode 4.0.1
orjson 3.11.9
packaging 26.2
parso 0.8.7
pexpect 4.9.0
pillow 12.2.0
platformdirs 4.11.0
prompt-toolkit 3.0.53
propcache 0.5.2
psutil 7.2.2
ptyprocess 0.7.0
pure-eval 0.2.3
pyaml 26.7.0
pygltflib 1.16.5
pygments 2.20.0
pyparsing 3.3.2
pyperclip 1.9.0
python-dateutil 2.9.0.post0
pyyaml 6.0.3
pyzmq 27.1.0
questionary 2.1.1
requests 2.34.2
runtype 0.5.3
scipy 1.18.0
simple-websocket 1.1.0
six 1.17.0
stack-data 0.6.3
threejs-materials 1.2.2
tornado 6.5.7
traitlets 5.15.1
trame 3.13.2
trame-client 3.13.2
trame-common 1.2.4
trame-components 2.5.0
trame-server 3.12.5
trame-vtk 2.11.15
trame-vuetify 3.2.5
typing-extensions 4.16.0
typing-inspect 0.9.0
urllib3 2.7.0
vtk 9.6.2
watchdog 6.0.0
wcwidth 0.8.2
webcolors 24.8.0
websockets 16.1.1
werkzeug 3.1.8
wrapt 2.3.0
wslink 2.5.7
wsproto 1.3.2
yarl 1.24.5
Using: vscode with OCP CAD VIEWER
shell()raisesStdFail_NotDonefor any sphere created on a Workplane whosenormal is not
±Z. The same sphere, in the same world pose, works fine when the rotation isbaked into the geometry instead of carried as a
TopLoc_Location. Two conditions must bothhold: a located (not baked) shape, and a sphere that retains at least one pole.
To Reproduce
Backtrace
Environment
OS: Fedora 44
Was CadQuery installed using Conda?: No uv and pip where used
Using: vscode with OCP CAD VIEWER