여러분 안녕하세요!

현재 첨부파일 문제 때문에 고민이 많아서 죽겠습니다.

하나의 CLASS을 사용하면 된다고 해서 아래와 같이 사용 하였습니다.

*&---------------------------------------------------------------------*
*&      Form  attach_file
*&---------------------------------------------------------------------
*       text
*----------------------------------------------------------------------*
FORM ATTACH_FILE USING P_OBJTYPE
                       P_OBJKEY.

  DATA: G_MARK.
  DATA  GO_MANAGER TYPE REF TO CL_GOS_MANAGER.
  DATA: GS_SERVICE_SELECTION TYPE SGOS_SELS,
        GT_SERVICE_SELECTION TYPE TGOS_SELS.
  DATA  GP_SERVICE   LIKE SGOSATTR-NAME.
  DATA  GS_OBJECT    TYPE BORIDENT.
  DATA  GS_BC_OBJECT TYPE SIBFLPOR.

  REFRESH GT_SERVICE_SELECTION.
  CLEAR GS_SERVICE_SELECTION.
  GS_SERVICE_SELECTION-SIGN = 'I'.
  GS_SERVICE_SELECTION-OPTION = 'EQ'.
  GS_SERVICE_SELECTION-LOW = 'PCATTA_CREA'.
  APPEND GS_SERVICE_SELECTION TO GT_SERVICE_SELECTION.

  IF GO_MANAGER IS INITIAL.
    CREATE OBJECT GO_MANAGER
      EXPORTING
        IP_NO_COMMIT         = ' '
        IP_NO_INSTANCE       = ' '
        IP_MODE              = 'E'
        IT_SERVICE_SELECTION = GT_SERVICE_SELECTION.
  ENDIF.

  GP_SERVICE =  'PCATTA_CREA'.
  GS_OBJECT-OBJKEY = P_OBJKEY.
  GS_OBJECT-OBJTYPE = P_OBJTYPE.

  CALL METHOD GO_MANAGER->START_SERVICE_DIRECT
    EXPORTING
      IP_SERVICE       = GP_SERVICE
      IS_OBJECT        = GS_OBJECT
      IS_BC_OBJECT     = GS_BC_OBJECT
    IMPORTING
      EP_AVAILABLE     = G_MARK
    EXCEPTIONS
      NO_OBJECT        = 1
      OBJECT_INVALID   = 2
      EXECUTION_FAILED = 3
      OTHERS           = 4.
  IF SY-SUBRC <> 0.
    MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
               WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
  ENDIF.
ENDFORM.                    " attach_file

그런데 "The service <'Attachment list'> is not available" 라는 메시지가 나타납니다.

OBJECT를 어떻게 만들으면 되는지 아시는 분들께서 조언을 해주시기 바랍니다.