DATA : LS_MOD_CELLS TYPE LVC_S_MODI,
         LS_CELLS TYPE LVC_S_MODI.
  DATA : L_IDX LIKE SY-INDEX.
  BREAK-POINT.
  LOOP AT RR_DATA_CHANGED->MT_MOD_CELLS INTO LS_MOD_CELLS.

    L_IDX = LS_MOD_CELLS-ROW_ID.
    READ TABLE IT_DATA INDEX L_IDX.
    LV_MENGE = IT_DATA-MENGE.
    CASE LS_MOD_CELLS-FIELDNAME .
      WHEN 'LFDAT'.

        IT_DATA-LFDAT  = LS_MOD_CELLS-VALUE.

      WHEN 'MENGE'.
     
      IT_DATA-MENGE  = LS_MOD_CELLS-VALUE.
    
      WHEN 'FIXKZ'.
        IT_DATA-FIXKZ =  LS_MOD_CELLS-VALUE.

      WHEN  'LOEKZ'.
        IT_DATA-LOEKZ  = LS_MOD_CELLS-VALUE.
    ENDCASE.

    MODIFY  IT_DATA INDEX L_IDX TRANSPORTING LFDAT MENGE FIXKZ LOEKZ.

  ENDLOOP.

* 강제로 화면 PBO, PAI 수행
  CALL METHOD CL_GUI_CFW=>SET_NEW_OK_CODE
    EXPORTING
      NEW_CODE = 'ETC'.

--> 이런식으로 DATA CHANGE 부분을 해줬는데요..

   제가 MENGE 부분을 바꾸면 덤프가 뜨네요..

   왜나는지 좀 원인 좀 알려주세요~

수량을 6000 -> 5000으로 바꿨습니다. 그후 실행을하면 이런 덤프에러가 나요.

[오류] Runtime Errors         CONVT_NO_NUMBER
       Except.                CX_SY_CONVERSION_NO_NUMBER
       Date and Time          2008.06.18 08:57:23

 Short text
     Unable to interpret "5,000 " as a number.

 어떤 문제가 발생했습니까?
     Error in the ABAP Application Program

     The current ABAP program "ZTEST01" had to be terminated because it has
     come across a statement that unfortunately cannot be executed.

 오류분석
     An exception occurred that is explained in detail below.
     The exception, which is assigned to class 'CX_SY_CONVERSION_NO_NUMBER', was not
      caught in
     procedure "DATA_CHANGED" "(FORM)", nor was it propagated by a RAISING clause.
     Since the caller of the procedure could not have anticipated that the
     exception would occur, the current program is terminated.
     The reason for the exception is:
     The program attempted to interpret the value "5,000 " as a number, but
     since the value contravenes the rules for correct number formats,
     this was not possible.