After upgrading to 0.4.61 I found that there was a JSON serialization error occurring when I created the parts list. The error I am seeing is:

12:22:11 PropertyPythonObject::toString(): failed for <class 'a2p_importedPart_class.ImportedPartViewProviderProxy'>
12:22:11 Traceback (most recent call last):
File "/usr/lib/python3.10/json/init.py", line 231, in dumps
return _default_encoder.encode(obj)
File "/usr/lib/python3.10/json/encoder.py", line 199, in encode
chunks = self.iterencode(o, _one_shot=True)
File "/usr/lib/python3.10/json/encoder.py", line 257, in iterencode
return _iterencode(o, 0)
File "/usr/lib/python3.10/json/encoder.py", line 179, in default
raise TypeError(f'Object of type {o.class.name} '
<class 'TypeError'>: Object of type FeaturePython is not JSON serializable

This error doesn't seem to prevent parts lists being created but it might cause issues elsewhere. I have raised this separately because I don't think it is related to the parts list issue that I raised previously.

FreeCAD info:

[code]
OS: KDE Flatpak runtime (KDE/plasma)
Word size of FreeCAD: 64-bit
Version: 0.21.2.33771 (Git)
Build type: Release
Branch: (HEAD detached at b9bfa5c)
Hash: b9bfa5c5507506e4515816414cd27f4851d00489
Python 3.10.13, Qt 5.15.10, Coin 4.0.0, Vtk 8.2.0, OCC 7.6.3
Locale: English/Australia (en_AU)
Installed mods:

• A2plus 0.4.61
• ExplodedAssembly
• GdsLightBlue 0.0.1
  [/code]