METHOD if_ex_bom_update~change_at_save.

    DATA:z_stpob      TYPE LINE OF cs01_stpob_tab,

         z_stpob1     TYPE LINE OF cs01_stpob_tab,

         g_tab_bstpob TYPE TABLE OF stpob,

         g_tab_astpob TYPE TABLE OF stpob,

         z_msg        TYPE string,

         count1       TYPE i,

         count2       TYPE i.

    DATA:lv_time TYPE i.

    count1 = lines( delta_stasb ).

    count2 = lines( delta_stpob ).

*    IF count2 > count1.

    LOOP AT delta_stpob INTO z_stpob.

      APPEND z_stpob TO g_tab_bstpob.

      IF sy-tabix <= count1.

      ELSE.

        APPEND z_stpob TO g_tab_astpob.

      ENDIF.

    ENDLOOP.

    LOOP AT g_tab_astpob INTO z_stpob.

      CLEAR:lv_time.

      LOOP AT g_tab_bstpob INTO z_stpob1 WHERE idnrk = z_stpob-idnrk.

        lv_time = lv_time + .

      ENDLOOP.

      IF lv_time > .

        CONCATENATE z_msg '项目' z_stpob-posnr '组件重复/' INTO z_msg.

      ENDIF.

    ENDLOOP.

    MESSAGE z_msg TYPE 'E'.

    RETURN.

*    EXIT.

  ENDMETHOD.