Connection between Two servers : FM Required

Question

Dear All,
I'm doing one report which calls RFC enabled Z function module.
The function module is connecting to another SAP system through Logical system name.
If the connection fails, then I need to pass an error message.
Can anyone please tell me the FM name or way to do it?
Points will be rewarded for the correct solution.
Thanks in advance.
Regards,
Neeraj

Answer 1

Hello Neeraj
RFC-enabled function modules should not raise exception within their coding because otherwise the RFC connection will break down. Therefore, your z-function module should not have any exceptions. Instead collect A/E/X messages and return them - like BAPIs do - in an TABLES or EXPORTING parameter of type BAPIRET2 (or BAPIRETTAB).
Call your function module like this:
  DATA:
    ld_rfc_failure   TYPE bapi_msg,
    lt_return         TYPE bapirettab.
  CALL FUNCTION 'Z_MY_RFC_FUNC'
    DESTINATION 'rfc destination'
    EXPORTING
    IMPORTING
      et_return = lt_return  " collected messages
   TABLES
   EXCEPTIONS
     system_failure = 1 MESSAGE ld_rfc_failure
     communication_failure = 2 MESSAGE ld_rfc_failure.
  LOOP AT lt_return TRANSPORTING NO FIELDS
                 WHERE ( type CA 'AEX' ).  " A/E/X message
    EXIT.
  ENDLOOP.
  IF ( syst-subrc = 0 ).
"    error occured -> error handling
  ENDIF.
The longtext of the RFC failure can be captured using the MESSAGE option.
Regards
  Uwe