Hello Olivier,
Can you create a simple surface (a square surface) in SpaceClaim and then, create a mesh in Mechanical and try to open the simple square surface in ACP? If you cannot do this, then there is a problem with your software setup. If you can do this, then the problem may be your geometry.
Have you also tried to open your geometry in SpaceClaim to convert it to SpaceClaim file format before going to Mechanical for meshing?
Reno.
You are navigating away from the AIS Discovery experience