Problems displaying itab with 'REUSE_ALV_GRID_DISPLAY'

Question

Hi experts!
I have a problem displaying the internal table itab_test. Itab_uload is a TYPE TABLE of a complex and nested structure I defined in the DDIC. I am able to pass the entries, which are not conform with the specifications, to itab_test, but when I execute the program I get a short dump.
Error message is:" It was tried to pass the internal table IT_FIELDCAT to the formal parameter IT_FIELDCAT. In doing so, a ^type conflict occured between the formal and the actual parameter."
Can anybody please advise on the code-sample below. What did I wrong and what can I do to correct it?
Thanks a lot for your help!
Johann
P.S.:Points will be rewarded for helpful answers!
*&          DECLARATIONS
TYPES: BEGIN OF error_test,
       oz TYPE c,
       bez TYPE c,
       END OF error_test.
DATA: itab_test TYPE TABLE OF error_test WITH HEADER LINE,
      itab_upload TYPE TABLE OF zstr_gaeb WITH HEADER LINE.
DATA: wa_upload TYPE zstr_gaeb,
      wa_lvbereich TYPE zstr_lvbereich,
      wa_bereichdeslv TYPE zstr_bereichdeslv,
      wa_beschreibung TYPE zstr_lvbeschreibung,
      wa_position TYPE zstr_position.
DATA :      it_fieldcat TYPE lvc_t_fcat,
          wa_fieldcat LIKE LINE OF it_fieldcat,
          wrk_pos TYPE i.      
*&           START OF SELECTION
START-OF-SELECTION.
LOOP AT itab_upload INTO wa_upload.
    LOOP AT wa_upload-vergabe-lv-lvbereich INTO wa_lvbereich.
      oz_len = STRLEN( wa_lvbereich-oz ).
      IF oz_len <> 3.
        MOVE wa_lvbereich-oz TO itab_test-oz.
        MOVE wa_lvbereich-bez TO itab_test-bez.
      ENDIF.
    ENDLOOP.
  ENDLOOP.
  CLEAR wa_fieldcat.
  wrk_pos = wrk_pos + 1.
  wa_fieldcat-col_pos = wrk_pos.
  wa_fieldcat-tabname = 'ITAB_TEST'.
  wa_fieldcat-fieldname = 'oz'.
  wa_fieldcat-seltext = 'Ordnungszahl'.
  wa_fieldcat-emphasize = ''.
  wa_fieldcat-hotspot = 'X'.
  APPEND wa_fieldcat TO it_fieldcat.
  CLEAR wa_fieldcat.
  wrk_pos = wrk_pos + 1.
  wa_fieldcat-col_pos = wrk_pos.
  wa_fieldcat-tabname = 'ITAB_TEST'.
  wa_fieldcat-fieldname = 'bez'.
  wa_fieldcat-seltext = 'Bezeichnung'.
  wa_fieldcat-emphasize = ''.
  wa_fieldcat-hotspot = ''.
  APPEND wa_fieldcat TO it_fieldcat.
  CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
   EXPORTING
  I_INTERFACE_CHECK                 = ' '
  I_BYPASSING_BUFFER                = ' '
  I_BUFFER_ACTIVE                   = ' '
  I_CALLBACK_PROGRAM                = ' '
  I_CALLBACK_PF_STATUS_SET          = ' '
  I_CALLBACK_USER_COMMAND           = ' '
  I_CALLBACK_TOP_OF_PAGE            = ' '
  I_CALLBACK_HTML_TOP_OF_PAGE       = ' '
  I_CALLBACK_HTML_END_OF_LIST       = ' '
  I_STRUCTURE_NAME                  =
  I_BACKGROUND_ID                   = ' '
  I_GRID_TITLE                      =
  I_GRID_SETTINGS                   =
  IS_LAYOUT                         =
     it_fieldcat                       = it_fieldcat
  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
  I_HTML_HEIGHT_TOP                 = 0
  I_HTML_HEIGHT_END                 = 0
  IT_ALV_GRAPHICS                   =
  IT_HYPERLINK                      =
  IT_ADD_FIELDCAT                   =
  IT_EXCEPT_QINFO                   =
  IR_SALV_FULLSCREEN_ADAPTER        =
IMPORTING
  E_EXIT_CAUSED_BY_CALLER           =
  ES_EXIT_CAUSED_BY_USER            =
    TABLES
      t_outtab                          = itab_test
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.

Answer 1

Hello,
Make the change like this
  DATA: L_R_REPID LIKE SY-REPID.
  L_R_REPID = SY-REPID.
CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
EXPORTING
I_CALLBACK_PROGRAM = L_R_REPID " CHeck here
* I_INTERFACE_CHECK = ' '
* I_BYPASSING_BUFFER = ' '
* I_BUFFER_ACTIVE = ' '
* I_CALLBACK_PROGRAM = ' '
* I_CALLBACK_PF_STATUS_SET = ' '
* I_CALLBACK_USER_COMMAND = ' '
* I_CALLBACK_TOP_OF_PAGE = ' '
* I_CALLBACK_HTML_TOP_OF_PAGE = ' '
* I_CALLBACK_HTML_END_OF_LIST = ' '
* I_STRUCTURE_NAME =
* I_BACKGROUND_ID = ' '
* I_GRID_TITLE =
* I_GRID_SETTINGS =
* IS_LAYOUT =
it_fieldcat = it_fieldcat
* 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
* I_HTML_HEIGHT_TOP = 0
* I_HTML_HEIGHT_END = 0
* IT_ALV_GRAPHICS =
* IT_HYPERLINK =
* IT_ADD_FIELDCAT =
* IT_EXCEPT_QINFO =
* IR_SALV_FULLSCREEN_ADAPTER =
* IMPORTING
* E_EXIT_CAUSED_BY_CALLER =
* ES_EXIT_CAUSED_BY_USER =
TABLES
t_outtab = itab_test
* 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.
VAsanth