Diagnosis
In at least one tree in the Data Warehousing Workbench, lower-levelobjects still exist for this &V1&. For example, an object with objecttype &V2& and object name &V3& may still be assigned to this &V1&.

System Response
V1 cannot be deleted.

Procedure
First delete all lower-level objects, or assign these objects to adifferent &V1&.