I'm trying to clash detect a curtain wall against the structural beams and columns.

All the files i am using are IFC and have ran the check against Pset_CurtainWallCommon vs Pset_Beam Common and Pset_ColumnCommon.

The issue i have is when i complete the test i get a clash against panels and mullions. Some of the Curtain Walls having a lot of mullions. (Native files are all Revit)

This means i have hundreds of Clashes on a single curtain wall unit.

Does anyone know of a way that i can reduce the number of clashes which are effectively the same element?
I.e a structural column against the System (Revit Curtain Wall). Not every element within the system.

I would have thought the ignore rule 'Items in the same group/block/cell' would work here, but the Revit Curtain Wall is not a normal family.

Many thank Alex