Good morning @Hans_Lammerts - I looked at your file and the reason the import is failing in Blender is because the IfcAdvancedBrep geometry representation is not fully supported in IfcOpenShell yet. IfcOpenShell is not alone in this issue, unfortunately - as you can see many viewers have issues with this type of geometry. If I import your IFC2X3 file (which doesn’t have IfcAdvancedBrep), then it works perfectly 
- however this issue should be solved. The good news is that there is already a known bug for this. Do you mind sharing your file with @aothms ? If so, he is the IfcOpenShell expert who can help fix this!
I have attached XBim’s attempt to load your IFC4 model with IfcAdvancedBrep - it also seems to have issues. I did manage to load it in BIMCollab, though, so that’s a good sign!
