Message SAP X4225 - No alternative work center was found for operation &1

Diagnosis
During the transfer from SAP APO, an attempt was made to readalternative resources or work centers via the classification foroperation &V1& of the plan or recipe &V2&, from the plan group or recipegroup &V3&. No alternative resources or work centers have been found.

System Response
No work center change or resource change takes place. Processing of theoperation is continued with the original work center.

Procedure
There can be two reasons:
No classification has been defined in the SAP ECC system for theoperation.
The original work center is the only work center permitted on the basisof the classification.
Check the classification for the operation.