On Core2Duo CPU, the default numpy (via flatpak FreeCAD) requires X86_V2 to run, but downgrading to numpy<2.4.0 helps for now

[Hukkinen]

Hey,

Just documenting the workaround here.

THE ERROR MESSAGE

$ Initializing Assembly4.1 workbench (0.61.0-0.2) ........................ done.
Traceback (most recent call last):
File "/app/freecad/Mod/PartDesign/InitGui.py", line 45, in Initialize
from PartDesign.WizardShaft import WizardShaft
File "/app/freecad/Mod/PartDesign/WizardShaft/WizardShaft.py", line 27, in
from .Shaft import Shaft
File "/app/freecad/Mod/PartDesign/WizardShaft/Shaft.py", line 24, in
from .SegmentFunction import SegmentFunction, IntervalFunction, StressFunction, TranslationFunction
File "/app/freecad/Mod/PartDesign/WizardShaft/SegmentFunction.py", line 24, in
import numpy as np
File "/app/lib/python3.13/site-packages/numpy/init.py", line 112, in
from numpy.config import show_config
File "/app/lib/python3.13/site-packages/numpy/config.py", line 4, in
from numpy._core._multiarray_umath import (
...<3 lines>...
)
File "/app/lib/python3.13/site-packages/numpy/_core/init.py", line 24, in
from . import multiarray
File "/app/lib/python3.13/site-packages/numpy/_core/multiarray.py", line 11, in
from . import _multiarray_umath, overrides
RuntimeError: NumPy was built with baseline optimizations:
(X86_V2) but your machine doesn't support:
(X86_V2).

CPU model name : Intel(R) Core(TM)2 Duo CPU T9400 @ 2.53GHz

THE "FIX" (via aimode):

$ flatpak run --command=pip org.freecad.FreeCAD install --user --upgrade "numpy<2.4.0"
Collecting numpy<2.4.0
Downloading numpy-2.3.5-cp313-cp313-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl.metadata (62 kB)
Downloading numpy-2.3.5-cp313-cp313-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl (16.6 MB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 16.6/16.6 MB 15.7 MB/s 0:00:01
Installing collected packages: numpy
WARNING: The scripts f2py and numpy-config are installed in '/var/data/python/bin' which is not on PATH.
Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
Successfully installed numpy-2.3.5

[notice] A new release of pip is available: 26.0.1 -> 26.2.1
[notice] To update, run: python -m pip install --upgrade pip

ERROR RESOLVED:

$ flatpak run --branch=stable org.freecad.FreeCAD
FreeCAD 1.1.3, Libs: 1.1.3R44987 (Git)
(C) 2001-2011 FreeCAD contributors
FreeCAD is free and open-source software licensed under the terms of LGPL2+ license.

Initializing Assembly4.1 workbench (0.61.0-0.2) ........................ done.

--
BR,

Janne