SAP ABAP Message Number SLS - 211 (SLS) is used by

• Function Module (3)

#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component
1	Function Module	BAPI_SLS_BOOK_BOOKING_LIST	Read bookings of participants	SIWL	BASIS	SAP_BASIS
2	Function Module	BAPI_SLS_BOOK_BOOKING_ONLINE	Read bookings of participants in online scenario	SIWL	BASIS	SAP_BASIS
3	Function Module	BAPI_SLS_IOA_GET_IOASSIGN_LIST	Read Info Object Assignments from a location	SIWL	BASIS	SAP_BASIS