SAP Message X4012 - Production version &1 for material &2 in plant &3 is locked

Diagnosis
Production version &V1& for material &V2& in plant &V3& is locked forexplosion date &V4&.
Locked production versions cannot be used in production orders andprocess orders.

System Response
Processing is terminated.

Procedure
Unlock production version &V1& in SAP ECC or ensure that a validproduction version is transferred from the external system.