Problem: Constraints are broken after replacing parts in NX-Assembly.

Solution: In ifugnx.cfg, set the key createNamedFacesAndEdges to "Yes".

The NX Constraint Solver uses face and edge names when trying to fix constraints of replaced parts. Generation of names for faces slows down the export process slightly, but helps the solver with these simple replacement cases. This will stop working as soon as the number of faces/edges in the replacement model is different.

(Models generated with this setting on take slightly longer and are slightly larger.)

Example: Broken Constraints