SAP Message AJ663 - DPC ESTB:BillOrd. Install. &1, SchBillDate &2, BillTrans. &3 not billable DOCUMENTATION DiagnosisINTERNAL ERROR:>The billing order cannot be billed. However, this is a prerequisite inroutine GET_CAT_ACT_PERIOD_ESTB in include LEADYPERCONF03.INCLUDE ISU_SAP OBJECT DOKU ID TX