SAP Message RU300 - Controlling area of work center (&) differs from order (&)

Diagnosis
The controlling area of the work center does not correspond to that ofthe order. You can only enter work centers from plants that correspondto that of the order.
A work center or order is assigned to a controlling area via a plantand company code.

Procedure
You should enter a work center from a plant that corresponds to thecontrolling area of the order.