Message SAP WRF_REF011 - &4 Material &1 in plant &2 is not listed now nor in future

Diagnosis
Material &V1& in plant &V2& is not listed now nor in future.

System Response
The system cannot assign references automatically in this case.

Procedure
List this material/plant combination or create the reference assignmentmanually.
The program issues this message as a warning because the system cannotcompute and suggest a valid-to date. You must enter this date manually.