SAP Message WC128 - Material group &2 is not assigned to store &1

Diagnosis
Store &V1& has not been assigned material group &V2&.

System Response
The record could not be prepared for material &V3& in POS - interfaceoutbound processing.

Procedure
Maintain the assignment via plantmaintenance.
After displaying plant data, choose the 'Material groups' pushbutton.
If the error occurs on initialization, you must re-startPOS outbound.
If the error occurs in change mode, you do not have to take any furtheraction, as the data will be retransmitted next time.