$ 0 0 it is an ASYNC interface. You are just making a soap lookup in the mapping. Just a reference - http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/a0b6bb9d-7689-2c10-52a7-c3bd341d4e5f?QuickLink=index&overridelayout=true&45217415850424