Integration with Other Applications > Windchill Workgroup Manager Documentation > NX > Advanced Techniques > Managing NX Part Families > Assumptions and Restrictions
  
Assumptions and Restrictions
Consider the following assumptions:
Instances cannot be changed in NX without also changing the generic.
A managed generic cannot be changed in NX without also changing all instances of that generic.
The Part Families Member Directory should be set to the Local Workspace to prevent the creation of unmanaged instances.
Windchill does not support managing reference sets.
Windchill does not support managing drawings as family objects.
A Family Table member having .prt in its name (DB_PART_NAME) in an NX Part Family spreadsheet cannot be saved to the Workspace.