SAP Message V6538 - Combination of activity codes & & is not provided for

Diagnosis
When processing a package of IDocs of message category SHIPPL(externally planned shipments) the system determined that the sameshipment is contained more than once in the package. In that case onlythe last IDoc from the shipment is processed and the action code isre-determined.
A new action code should have been determined in routine'NEW_ACTION_CODE' for program SAPLV56I.
A new action code could not be defined for the predefined combinationof both preceding action codes.

System Response
Terminate

Procedure
Check whether field ACTCD in the segment E1TPACC in the inbound IDoc(message category SHIPPL) contains unpermitted objects.