SAP Message UACE069 - Connections between objects of types &1 and &2 are not allowed

Diagnosis
The system attempted to generate a link as a connection between objectsof types &V1& and &V2&. However, this connection is not allowed in thestructure maintenance.

System Response
The link cannot be generated.

Procedure
Either choose another sender object type, or change the permittedconnections in the structure maintenance.