SAP Message WD508 - Binding could not be defined automatically

Diagnosis
The desired binding could not be defined automatically.
The binding cannot be automatically created if no or more than oneunique correspondence was found in the containers.
Certain elements can be excluded from the automatic binding definition,if an automatic definition is guaranteed to fail.
No data bindings were created to object references of object typeswithout key fields.

System Response
No binding is created.

Procedure
Define the binding manually.