SAP ABAP Message Number 8I - 821 (8I) is used by

• Function Module (2)

#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component
1	Function Module	J_1I_MM_SER_CAT_DETERMINE	Service category determination on MM side	J1I2	APPL	SAP_APPL
2	Function Module	J_1I_SERV_CATG_DET_FIINV	Determine Service category for FI Invoices ST3	J1I2	APPL	SAP_APPL