SAP ABAP Message Number F2 - 636 (F2) is used by

• Class (1)
• Function Module (2)
• Program (5)

#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component
1	Function Module	FIORI_CMD_CONTACT_DUPLIC_CHECK	Fiori My Contacts: Contact Person Create/Update Duplicate Check	ERP_SD_ODATA_CUST	APPL	SAP_APPL
2	Function Module	KNVK_DUPLICATE_CHECK	Prüfen der knvk auf Doubletten	VS	APPL	SAP_APPL