Message store

Question

Hi,
I have a code which calls standard function module. The standard function module outputs messages using the message statement. So, if an error occurs in the function module, it does not return me back anything through the program, but just gives out an error message, which I would not be aware of through my program.
Is there a way to activate any memory log, so that whenever such error/ warning messages happen in the standard function module, then message will be sent to the log, and when the control returns to my program, I can read the message log, and call the appropriate handler from my code.
Thanks,
Juwin

Answer 1

The function module just does not throw any exception. It gives out an error message and stops right there. I would rather prefer the function module to throw an exception and let me handle the error in my own way.
The code I am using is:
FORM create_to .
  CLEAR v_tanum.
  CALL FUNCTION 'L_TO_CREATE_SINGLE'
    EXPORTING
      i_lgnum               = v_0200data-lgnum
      i_bwlvs               = v_0200data-bwlvs
      i_matnr               = v_0200data-matnr
      i_werks               = v_0200data-werks
      i_lgort               = v_0200data-lgort
      i_anfme               = v_0200data-qnty
      i_altme               = v_0200data-uom
      i_squit               = 'X'
      i_wempf               = v_0200data-recipient
      i_vlenr               = v_storageunit
      i_nltyp               = v_0200data-sttype
      i_nlpla               = v_0200data-destbin
      i_update_task         = 'X'
      i_commit_work         = space
    IMPORTING
      e_tanum               = v_tanum
    EXCEPTIONS
      no_to_created         = 1
      bwlvs_wrong           = 2
      betyp_wrong           = 3
      benum_missing         = 4
      betyp_missing         = 5
      foreign_lock          = 6
      vltyp_wrong           = 7
      vlpla_wrong           = 8
      vltyp_missing         = 9
      nltyp_wrong           = 10
      nlpla_wrong           = 11
      nltyp_missing         = 12
      rltyp_wrong           = 13
      rlpla_wrong           = 14
      rltyp_missing         = 15
      squit_forbidden       = 16
      manual_to_forbidden   = 17
      letyp_wrong           = 18
      vlpla_missing         = 19
      nlpla_missing         = 20
      sobkz_wrong           = 21
      sobkz_missing         = 22
      sonum_missing         = 23
      bestq_wrong           = 24
      lgber_wrong           = 25
      xfeld_wrong           = 26
      date_wrong            = 27
      drukz_wrong           = 28
      ldest_wrong           = 29
      update_without_commit = 30
      no_authority          = 31
      material_not_found    = 32
      lenum_wrong           = 33
      OTHERS                = 34.
  IF sy-subrc <> 0.
    PERFORM err_message USING 7.
  ELSE.
    IF v_tanum IS NOT INITIAL.
      COMMIT WORK AND WAIT.
      PERFORM err_message USING 8.
    ENDIF.
  ENDIF.
  LEAVE TO TRANSACTION sy-tcode.
ENDFORM.                    " create_to