this question should be posted to the Simcenter Community Forum, as Femap is not a CAD System, but also contains FEM Info, like Meshes, Load/Boundary Conditions etc.
I am a rookie and have never tried it, but it should work that way:
Export Solid Geometry from Femap (Parasolid)
Export FEM-Data (using a Nastran Deck for example)
in NX Advanced Simulation (now called Simcenter) you can import these into a NX Part and in a FEM file, and reassociate the mesh to the geometry, if needed.
If this does not answer your question, you may need to post into the Simcenter Community.
Thank you very much for an explanation, next time I will post in Simcenter Forum.
Short question: Question related to programming under NX also should be posted on Simcenter Forum?
Actually, my colleague has solved this today by accident. He used Import - Simulation command and file with the model for Nastran solver.