SAP Message WZ406 - Object type and delegated subtype supplied by SAP

Diagnosis The object type you specified was supplied by SAP AG, and thereforecannot be extended by you. In addition, there is a delegation toanother object supplied by SAP AG. Therefore, neither the supertype nor the subtype can be extended. Touse an event on another subtype, the delegation would have to bechanged. Procedure Choose another object type (the subtype itself).