Diagnosis
You are trying to include architectural object type &V1& within ahierarchy.

System Response
Architectural object type &V1& is defined as the top level object typein the hieararchy, and therefore can only be used as the top nodein the hierarchy.

Procedure
In order to add architectural object type &V1& at a different level ofthe hierarchy, remove the top level indicator for the object inthe Create Architectural Object Types
IMG activity.
Note: At least one architectural object type has to be designatedas a top level object.