SAP Message WS615 - No message determination schema is entered in billing type &1

Diagnosis You want to IF &V3& = 'X'. edit ELSE. issue a message for document &V2&. ENDIF. However, no message determination schema is entered in billingdocument type &V1&. System Response The system cannot perform the required function. Procedure Include a message determination schema in the billing document type. INCLUDE 'NA_CUST_MAINTAIN' OBJECT DOKU ID TX IF &DEVICE&='SCREEN' Maintain billing document type ENDIF.