Is anyone else having issues exporting assembly models out of Creo 2.0? Specifically, in to NX? I have tried everything I can think of to get this to work, and it won't open in NX. I've also tried parasolid files too, and they also error out. Everything worked fine in Wildfire 4
which version of NX do you use?
I'm not sure exactly but did you try both AP203 and AP214 which are options of STEP.
You can change these options with Config Option, "step_export_format".
I hope you can solve the problem with this.
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.
Did you look through the export options to see if breps can be output as something else? Use F4 to see all the options when the export dialog opens.