Diagnosis
You attempted to delete a technical leaf (that is, a delta node) in thehierarchy. This is not possible because the delta node is assigned asan attribute to the higher-level, non-postable hierarchy node.

System Response
The delta node cannot be deleted.

Procedure
If you want to allocate a different delta node to the hierarchy node,this is only possible by maintaining the appropriate value of the nodecharacteristic. The next time the hierarchy is read, the new delta nodewill automatically appear in the hierarchy structure.