Where Used List (Table) for SAP ABAP Data Element REF_ID (Unique Reference Number)

#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component

1	Table	BAPICRMDH2 - REF_ID	BAPI Structure for Downloading Header Data	CRMB	PI-CRM-BASIS	PI_BASIS
2	Table	BAPICRMUH1 - UPLOAD_ID	BAPI Structure for Uploading Header Data	CRMB	PI-CRM-BASIS	PI_BASIS
3	Table	BDOC_TRACK - UPLOAD_ID	Information on BDOCs During Load from CRM System/Back End	CRMB	PI-CRM-BASIS	PI_BASIS
4	Table	CND_MEM_INF_UPL - REF_ID	Lock Table for Initial Load	CND_EXCHANGE_INBOUND	PI_APPL	SAP_APPL
5	Table	CRMKEY - UPLOAD_ID	CRM Key Assignment at Table Level	CRMB	PI-CRM-BASIS	PI_BASIS
6	Table	MASSDATA_HEADER - REF_ID	Header Structure for Mass Data	CRMB	PI-CRM-BASIS	PI_BASIS