Runtime error while using GUI_UPLOAD

Question

Hi All,
I have a text file which contains few records delimited by tab.
I am trying to upload the contents of the file into an internal table using the FM GUI_UPLOAD
But, I am getting run time error 'Type conflict when calling a function module'.
The code that I had written is shown below.
Please let me know where I went wrong.
REPORT  Z84364BDC                               .
TYPES : BEGIN OF ITAB_TP,
        MATNR TYPE MARA-MATNR,
        EAN11 TYPE MARA-EAN11,
        END OF ITAB_TP.
DATA : FILE_ITAB TYPE STANDARD TABLE OF ITAB_TP.
DATA : ITAB_WA TYPE ITAB_TP.
SELECTION-SCREEN BEGIN OF BLOCK B1 WITH FRAME TITLE TEXT-T01.
PARAMETERS : P_FILE TYPE RLGRAP-FILENAME DEFAULT 'D:\Example.txt'.
SELECTION-SCREEN END OF BLOCK B1.
***FILLING THE INTERNAL TABLE****
CALL FUNCTION 'GUI_UPLOAD'
  EXPORTING
    filename                      = P_FILE
    FILETYPE                      = 'ASC'
    has_field_separator           = ','
    tables
    data_tab                      = FILE_ITAB
EXCEPTIONS
   FILE_OPEN_ERROR               = 1
   FILE_READ_ERROR               = 2
   NO_BATCH                      = 3
   GUI_REFUSE_FILETRANSFER       = 4
   INVALID_TYPE                  = 5
   NO_AUTHORITY                  = 6
   UNKNOWN_ERROR                 = 7
   BAD_DATA_FORMAT               = 8
   HEADER_NOT_ALLOWED            = 9
   SEPARATOR_NOT_ALLOWED         = 10
   HEADER_TOO_LONG               = 11
   UNKNOWN_DP_ERROR              = 12
   ACCESS_DENIED                 = 13
   DP_OUT_OF_MEMORY              = 14
   DISK_FULL                     = 15
   DP_TIMEOUT                    = 16
   OTHERS                        = 17
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

The file is delimited by Comma field as mentioned above.
Below is the code that I had written. But, I face the same problem
REPORT  Z84364BDC                               .
TYPES : BEGIN OF ITAB_TP,
        MATNR TYPE MARA-MATNR,
        EAN11 TYPE MARA-EAN11,
        END OF ITAB_TP.
DATA : FILE_ITAB TYPE STANDARD TABLE OF ITAB_TP.
DATA : ITAB_WA TYPE ITAB_TP.
SELECTION-SCREEN BEGIN OF BLOCK B1 WITH FRAME TITLE TEXT-T01.
PARAMETERS : P_PATH TYPE RLGRAP-FILENAME DEFAULT 'D:\Example.txt'.
SELECTION-SCREEN END OF BLOCK B1.
DATA : P_FILE TYPE STRING.
P_FILE = P_PATH.
****FILLING THE INTERNAL TABLE*****
CALL FUNCTION 'GUI_UPLOAD'
  EXPORTING
    filename                      = P_FILE
    FILETYPE                      = 'ASC'
    has_field_separator           = 'X'
    tables
    data_tab                      = FILE_ITAB
EXCEPTIONS
   FILE_OPEN_ERROR               = 1
   FILE_READ_ERROR               = 2
   NO_BATCH                      = 3
   GUI_REFUSE_FILETRANSFER       = 4
   INVALID_TYPE                  = 5
   NO_AUTHORITY                  = 6
   UNKNOWN_ERROR                 = 7
   BAD_DATA_FORMAT               = 8
   HEADER_NOT_ALLOWED            = 9
   SEPARATOR_NOT_ALLOWED         = 10
   HEADER_TOO_LONG               = 11
   UNKNOWN_DP_ERROR              = 12
   ACCESS_DENIED                 = 13
   DP_OUT_OF_MEMORY              = 14
   DISK_FULL                     = 15
   DP_TIMEOUT                    = 16
   OTHERS                        = 17
IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
         WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
***Displaying the Material*****
LOOP AT FILE_ITAB INTO ITAB_WA.
WRITE:/ ITAB_WA-MATNR.
ENDLOOP.