Why does CALYPSO not recognize my PMI during import?

No real, functional PMI is included in the CAD model. The functional 3D-tolerance and "simple" drawing in 3D differ enormously!

To correctly recognize the PMI, the links with the geometries of the CAD model are necessary, i.e. control geometry elements must be stored on the PMI. CAD systems usually speak of "linked elements" or "surface references".