I have already tried that and got a negative response.
The IfcBuildingElementPart and the IfcMaterial are exported in Archicad in one package and cannot be differentiated.
Here an example of my building material appearing in borht ElementPart and Material in the IFC Structure.
... or I hope that someone here comes up with a solution and makes both of us happy
The BIMster @ AllesWirdGut
Currently: Archicad 24 & 22
User since Archicad 6.5 (2001)