You can retrieve the constraints of non-Creo models in multi-CAD assemblies. For retrieving the constraints, you must redefine the non-Creo models using the Edit Definition command in the Creo Parametric user interface. After redefinition, retrieve the constraints using the Creo TOOLKIT functions.

You can insert user-defined features created in Creo applications in a multi-CAD assembly, only if it does not alter the structure of the non-Creo models. You cannot create UDFs in a non-Creo model.