Multiple import of geometries

Hey there,

I have three geometrie files in the dxf file format. Adding an import to the model builder in the geometry part and trying to import these three geometries alone works. So the files should be ok.
BUT as soon, as I try to add a second import to the geometry part and load now these two.... it fails.
The error message is:
The imported file did not contain any geometries.
Why is that?!
Would be greatful if s.b. can help me out of this.

I'm using Multiphysics 4.0.

Greetings
Manuel Feuchter