ALV to Excel problem

Question

Good day,
I have a question on downloading the excel file from ALV list. ALV generates the correct output. However, when I download it to excel, the value is not populating correctly.
The field MATNR when displayed in ALV is 100000000000000001, 100000000000000002.
Output in excel is 100000000000000000, 100000000000000000.
Here is my code:
wa_fldcat-fieldname     = 'MATNR'.
  wa_fldcat-ref_tabname   = 'MARA'.
  wa_fldcat-ref_fieldname = 'MATNR'.
  APPEND wa_fldcat TO lt_fldcat.
  CLEAR  wa_fldcat.
  CALL FUNCTION 'REUSE_ALV_LIST_DISPLAY'
   EXPORTING
*   I_INTERFACE_CHECK              = ' '
*   I_BYPASSING_BUFFER             =
*   I_BUFFER_ACTIVE                = ' '
*   I_CALLBACK_PROGRAM             = SY-REPID
*   I_CALLBACK_PF_STATUS_SET       = ' '
*   I_CALLBACK_USER_COMMAND        = ' '
*   I_STRUCTURE_NAME               =
     is_layout                      = lt_layout
     it_fieldcat                    = lt_fldcat
*   IT_EXCLUDING                   =
*   IT_SPECIAL_GROUPS              =
*   IT_SORT                        =
*   IT_FILTER                      =
*   IS_SEL_HIDE                    =
*   I_DEFAULT                      = 'X'
*   I_SAVE                         = ' '
*   IS_VARIANT                     =
*   IT_EVENTS                      =
*   IT_EVENT_EXIT                  =
*   IS_PRINT                       =
*   IS_REPREP_ID                   =
*   I_SCREEN_START_COLUMN          = 0
*   I_SCREEN_START_LINE            = 0
*   I_SCREEN_END_COLUMN            = 0
*   I_SCREEN_END_LINE              = 0
*   IR_SALV_LIST_ADAPTER           =
*   IT_EXCEPT_QINFO                =
*   I_SUPPRESS_EMPTY_DATA          = ABAP_FALSE
* IMPORTING
*   E_EXIT_CAUSED_BY_CALLER        =
*   ES_EXIT_CAUSED_BY_USER         =
    TABLES
      t_outtab                       = it_data
   EXCEPTIONS
     program_error                  = 1
     OTHERS                         = 2
  IF sy-subrc <> 0.
    MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
            WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
  ENDIF.
Can someone enlighten me on why my excel file is generating such values? What should I do to get the correct values?
Thanks so much.

Answer 1

see the following example:
REPORT z_down_xml LINE-SIZE 132 NO STANDARD PAGE HEADING.
TABLES:
  makt,                                "Mat description
  marc,                                "Material / plant
  t001w,                               "plant name
  bhdgd.                               "Batch heading
Internal tables
DATA:
  BEGIN OF gt_marc OCCURS 0,
    werks LIKE marc-werks,
    matnr LIKE marc-matnr,
  END OF gt_marc,
Table to be downloaded as xml. Each line stores start and end tags
and the value
  BEGIN OF gt_xml OCCURS 0,
    line(120),
  END OF gt_xml,
  g_maktx(120).
User-input
SELECT-OPTIONS:
  s_werks FOR marc-werks,
  s_matnr FOR marc-matnr.
START-OF-SELECTION.
Extract all required data
  PERFORM main_processing.
END-OF-SELECTION.
  SORT gt_marc BY werks matnr.
  LOOP AT gt_marc.
    AT FIRST.                          "First tag must be root
      CLEAR gt_xml.
      gt_xml-line = ''.
    APPEND gt_xml.
    CLEAR gt_xml.
display data
    FORMAT COLOR 2 ON.
    WRITE :/ gt_marc-matnr, makt-maktx.
    FORMAT COLOR 2 OFF.
  ENDLOOP.
The last tag must be the root closing tag --*
  gt_xml-line = '</LOCATIONS>'.
  APPEND gt_xml.
  CLEAR gt_xml.
  CALL FUNCTION 'DOWNLOAD'
       EXPORTING
            filename = 'C:PLANT1.XML'
            filetype = 'ASC'
       TABLES
            data_tab = gt_xml.
TOP-OF-PAGE.
  MOVE sy-title TO bhdgd-line1.
  MOVE sy-repid TO bhdgd-repid.
  MOVE sy-uname TO bhdgd-uname.
  MOVE sy-datum TO bhdgd-datum.
  MOVE '0' TO bhdgd-inifl.
  MOVE '132' TO bhdgd-lines.
  FORMAT INTENSIFIED ON COLOR COL_HEADING.
  PERFORM batch-heading(rsbtchh0).     "report header
Form READ_PLANT
FORM read_plant.
Get plant name
  CLEAR t001w.
  SELECT SINGLE name1
    INTO t001w-name1
    FROM t001w
   WHERE werks EQ gt_marc-werks.
ENDFORM.                               " READ_PLANT
Form MAIN_PROCESSING
FORM main_processing.
Material and plant basic data
  SELECT werks matnr
    INTO TABLE gt_marc
    FROM marc
   WHERE werks IN s_werks
     AND matnr IN s_matnr.
ENDFORM.                               " MAIN_PROCESSING
Form READ_DESCRIPTION
FORM read_description.
Material name
  CLEAR g_maktx.
  SELECT SINGLE maktx
    INTO g_maktx
    FROM makt
   WHERE matnr EQ gt_marc-matnr
     AND spras EQ 'E'.
Replace special character
  DO.
    REPLACE '&' WITH '*ù%;' INTO g_maktx.
    IF NOT sy-subrc IS INITIAL. EXIT.ENDIF.
  ENDDO.
  DO.
    REPLACE '*ù%;' WITH '&amp;' INTO g_maktx.
    IF NOT sy-subrc IS INITIAL. EXIT.ENDIF.
  ENDDO.
  DO.
    REPLACE '/' WITH '&#47;' INTO g_maktx.
    IF NOT sy-subrc IS INITIAL. EXIT.ENDIF.
  ENDDO.
ENDFORM.