SAP ABAP Message Number 01 - 590 (01) is used by

• Class (1)
• Function Module (2)

#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component
1	Function Module	SUSR_BASE_AUTHORITY_CHECK	SUSR_BASE_AUTHORITY_CHECK	SUSR	BASIS	SAP_BASIS
2	Function Module	SUSR_USER_AGR_BUFFER_TO_DB	SUSR_USER_AGR_BUFFER_TO_DB	SUSR	BASIS	SAP_BASIS