SoFieldContainer_getField> returned a result with an exception set

[davecoventry]

Since upgrading my system KDE Neon from 20.04 to 22.04 my FreeCAD has been almost unusable.

I presume this is due to the perennial issue of incompatibility between versions of Python.

Here are my errors:

Code: Select all

<built-in function SoFieldContainer_getField> returned a result with an exception set
Traceback (most recent call last):
  File "<string>", line 152, in Activated
  File "/opt/freecad-source/freecad-build/Mod/Draft/draftguitools/gui_snapper.py", line 1578, in show
    self.setTrackers()
  File "/opt/freecad-source/freecad-build/Mod/Draft/draftguitools/gui_snapper.py", line 1622, in setTrackers
    self.grid = trackers.gridTracker()
  File "/opt/freecad-source/freecad-build/Mod/Draft/draftguitools/gui_trackers.py", line 972, in __init__
    pick.style.setValue(coin.SoPickStyle.UNPICKABLE)
  File "/usr/lib/python3/dist-packages/pivy/coin.py", line 3989, in __getattr__
    field = self.getField(name)
  File "/usr/lib/python3/dist-packages/pivy/coin.py", line 3873, in getField
    return _coin.SoFieldContainer_getField(self, name)

Code: Select all

OS: KDE neon 5.26 (KDE/plasma)
Word size of FreeCAD: 64-bit
Version: 0.21.31151 (Git)
Build type: Unknown
Branch: master
Hash: 1803cc0c7e9a9729002579890fe35c5373d3b451
Python 3.10.6, Qt 5.15.7, Coin 4.0.0, Vtk 7.1.1, OCC 7.5.1
Locale: English/South Africa (en_ZA)

[looo]

pivy needs to be updated for python3.10. Best to make an issue for your system.
As a workaround you can download pivy, and replace the system pivy. (Only the coin.so is needed to be replaced IICRC)
https://anaconda.org/conda-forge/pivy/0 ... _2.tar.bz2

pivy should be placed in /usr/lib/python3.10/site-packages/pivy (or similar)

[davecoventry]

Thanks for the assistance.

However, I can no longer get the Draft Workbench, which includes the Entity Snapping.

I have installed pivy in /opt/pivy-0.6.8

I have then linked to that directory:

Code: Select all

ln -s /opt/pivy-0.6.8 /usr/lib/python3/pivy
ln -s /opt/pivy-0.6.8 /usr/lib/python3.11/pivy
ln -s /opt/pivy-0.6.8 /usr/lib/python3.10/pivy
ln -s /opt/pivy-0.6.8 /usr/lib/python2.7/pivy

I get:
Error: Unknown error while trying to load Pivy.

[davecoventry]

https://www.mail-archive.com/ubuntu-bug ... 21304.html

Any remedies?

[dpward]

Fix released for pivy package in Ubuntu 22.04 LTS (and Ubuntu 22.10).
https://bugs.launchpad.net/ubuntu/+sour ... ug/2000840