If NX is tied to Teamcenter, and you are trying to import an assembly, you might be having Teamcenter rule issues where NX cannot create the components of the assembly.
Try opening NX native (no Teamcenter tie) and then import the STEP file.
If NX is tied to Teamcenter, and you are trying to import an assembly, you might be having Teamcenter rule issues where NX cannot create the components of the assembly.
Try opening NX native (no Teamcenter tie) and then import the STEP file.