SAP ABAP Message Number BUP_RELATIONS - 168 (BUP_RELATIONS) is used by

• Class (4)

#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component
1	Class	CL_BUP_RELD Method: CHECK_BEFORE_READ_IMP_PARAMS	BP Rel.: Segment Time-Dependent Relationship Attributes	S_BUPA_IPI	BASIS	SAP_BASIS
2	Class	CL_BUP_RELT Method: CHECK_BEFORE_READ_IMP_PARAMS	BP Relationships: Segment Relationships (BUT050)	S_BUPA_IPI	BASIS	SAP_BASIS
3	Class	CL_BUP_RELX Method: CHECK_BEFORE_READ_IMP_PARAMS	BP Relationships: Segment Generic BUT051 Relationships	S_BUPA_IPI	BASIS	SAP_BASIS
4	Class	CL_BUP_RELY Method: CHECK_INPUT_READ_IMP_PARAMS	General Relationship Addresses	S_BUPA_IPI	BASIS	SAP_BASIS