Is it possible to make an RFC lookup to a Function Module remote enabled that not is properly a BAPI? I'm trying using Michael RFC lookup sample, but in the sample he uses BAPI_PO_GETDETAIL (it's working fine to me). When I call a Function Module (import it to XI, make all the steps as in the sample), it returns an error "parameter with name RETURN not found".
I have tried to put this parameter exactly as it is on BAPI_PO_GETDETAIL, but still didn't work. Some tip?