SAP ABAP Table E1PREQCHANGE (Header Segment) is used by

• Function Module (2)

#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component
1	Function Module	ALE_PR_CHANGE	BAPI -> IDoc: ALE_PR_CHANGE	MEREQ	APPL	SAP_APPL
2	Function Module	IDOC_INPUT_PREQCHANGE	IDoc -> BAPI: IDOC_INPUT_PREQCHANGE	MEREQ	APPL	SAP_APPL