Ultimaker Cura - Python scipy Incompatibility

Robotmike2

Today I noticed Ultimaker Cura didn't start anymore. The lowest level error was:
ImportError: /usr/lib/python3.10/site-packages/scipy/spatial/_distance_wrap.cpython-310-x86_64-linux-gnu.so.avx2: undefined symbol: npy_copysign

By my limited understanding and research this seems to be a version incompatibility. I went on this site: https://anaconda.org/scipy-wheels-nightly/scipy/files# and downloaded this nightly build file: scipy-1.10.0.dev0+1575.dc45894-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl and installed it manually with pip3 install scipy-1.10.0.dev0+1575.dc45894-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl, which made Cura working again.
Don't know about side effects. And I don't know how to replace the nightly build with the stable version from the repos later, yet....

kyrios

I see there is already a task open for this defect : https://dev.getsol.us/T10330
be careful by installing packages that are shipped in the repo with pip/pip3 because it might cause incompatibilities.
As soon as the linked task is fixed and the changes are synced to the main repository (usually the friday following the change), please uninstall the packages installed with pip3 and update your system.