ISSUE:BDC In user exit

Question

Hi all,
I  have used BDC inside user exit.I am getting an error while activating the user exit .
The error is before the statement 'FORM' the structure included by 'FUNCTION' must be ended by 'ENDFUNCTION'.(Not getting what 'FUNCTION' is mentioned in error message)
  CALL TRANSACTION 'MM02' USING bdcdata MODE v_mode UPDATE 'S'
                                            MESSAGES INTO it_bdcmsg1.
    ENDLOOP.
FORM bdc_dynpro USING program dynpro.
  CLEAR bdcdata.
  bdcdata-program  = program.
  bdcdata-dynpro   = dynpro.
  bdcdata-dynbegin = 'X'.
  APPEND bdcdata.
ENDFORM.                    "BDC_DYNPRO
       Insert field                                                  *
FORM bdc_field USING fnam fval.
IF fval <> nodata.
  CLEAR bdcdata.
  bdcdata-fnam = fnam.
  bdcdata-fval = fval.
  APPEND bdcdata.
ENDIF.
ENDFORM.                    "BDC_FIELD

Answer 1

Hi,
This is beacuse you are trying to nest  the processing block, more strictly procedures. This is not possible in ABAP.
"Your customer exit simply lies between  these statements introducing procedure (funtion module)
FUNCTION....
INCLUDE some_customer_exit_here. 
ENDFUNCTION
You can't put any new procedure nor processing block inside this FUNCTION....ENDFUNCTION block.
Instead you have two possibilities:
- check function group of that function module, usually starts with X... for customer exists, add and include inside it, following SAP standard naming conventions for subroutines. It must be like inlcude ...F01 . Go inside there and create your subroutine (forms) here. Now in your cutomer exit simply use that form by calling it.
- create another program of type S (subroutine pool) and place your forms here. Now call it from customer include using PERFORM YOUR_NEW_PROGRAM_NAME(subroutine_name).
Regards
Marcin