SAP ABAP Message Number LOP - 155 (LOP) is used by

• Class (2)

#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component
1	Class	CL_LOP_DB_ACCESS Method: READ_FROM_DB	DB access	LOOP	APPL	SAP_APPL
2	Class	CL_LOP_LIST_MASTER Method: UPDATE_PREPARE	Option list as master data	LOOP	APPL	SAP_APPL