Diagnosis
For gross group &v1& there are document line items which are notdifferentiated by any of the checked differentiators. This is notpermitted.

System Response
INCLUDE ISU_VERARB OBJECT DOKU ID TX

Procedure
INCLUDE ISU_SAP OBJECT DOKU ID TX
Include the following data in your message:
Gross group,,&v1&
Billing document,,&v2&
Line,,&v3&