Error when opening settings

[GMellar]

When I save the settings and open them again I get the python error "AttributeError: 'NoneType' object has no attribute 'topPriorityLines'". Grids are imported but all associations to grids and materials are lost.

I'm using the Version from the main branch with FreeCAD Version 0.21.2.

[LubomirJagos42]

Hi, sorry for late answer, I corrected this, during loading settings .ini file there is delete of all items in UI and then it's repopulate, I tried your scenario on my PC and got this error in report view but loading process was not affected, anyway I repaired it and put it into new release version 0.4.2 please download it from here due I lost access to this repository and I am using new one:
https://github.com/LubomirJagos42/FreeCAD-OpenEMS-Export/releases

[LubomirJagos42]

Also I recommend to use FreeCAD version 0.20.2 because in latest verison I found error during STL export that distances are twice bigger as set in UI, I reported it to FreeCAD team and tried pre-release version where it's running as it should be, but still current version 0.21.2 on Windows have this error, I developed my GUI addon using 0.20.2 and there is everything running OK.

https://github.com/FreeCAD/FreeCAD/releases