yorik wrote: ↑Mon Jun 03, 2019 7:08 pm
Your gif goes too fast, I cant read the error message

But I'll try to reproduce this on my side to test...
Sorry. This is the error message:
Exception (Mon Jun 3 15:41:45 2019): Sketch::checkGeoId. GeoId index out range.
Traceback (most recent call last):
File "C:\Users\Rafael\Documents\Programs\FreeCAD_0.19.16883_x64_LP_12.1.2_PY3QT5-WinVS2015\Mod\Arch\ArchWall.py", line 760, in onChanged
obj.Base.movePoint(0,2,p2,0)
<class 'Base.FreeCADError'>: Sketch::checkGeoId. GeoId index out range.