SESSION METHOD( WRONG VALUE OF THE parameter file type)

Question

Hi here iam sending the whole code once to you. just chk it once and same error(WRONG VALUE OF THE parameter file type) is coming after the changes.
if i use asc it is giving that no file exists.
Table Declaration
tables :rf02k, "Maintain vendor master record screen and work fields
lfa1, "Vendor Master(general)
lfbk, "Vendor Master (Bank Details)
lfb1, "Vendor Master (Company Code)
lfm1, "Vendor master record purchasing organization data
lfb5. "Vendor master (dunning data)
Data Declaration
data : begin of it_UPLOAD occurs 0,
LIFNR like rf02k-lifnr, "vendor no
BUKRS like rf02k-bukrs, "company code
EKorg like rf02k-ekorg, "purchasing org
KTOKK like rf02k-ktokk, "account group
anred like lfa1-anred, "initial
name1 like lfa1-name1, "name of vendor
sortl like lfa1-sortl, "search term
land1 like lfa1-land1, "country
akont like lfb1-akont, "reconcillation a/c.
fdgrv like lfb1-fdgrv, "planning group
zterm like lfb1-zterm, "terms of payment key
mahna like LFB5-MAHNA, "dunning procedure
waers like lfm1-waers, "Purchase order currency
END OF IT_UPLOAD.
DATA : IT_BDCDATA LIKE BDCDATA OCCURS 0 WITH HEADER LINE.
include bdcrecx1.
start-of-selection.
UPLOADING THE DATA TO IT_UPLOAD
call function 'GUI_UPLOAD'
exporting
filename = 'C:\DASRR\VENDOR1.TXT'
filetype = 'DAT'
has_field_separator = 'X'
HEADER_LENGTH = 0
READ_BY_LINE = 'X'
DAT_MODE = ' '
CODEPAGE = ' '
IGNORE_CERR = ABAP_TRUE
REPLACEMENT = '#'
CHECK_BOM = ' '
IMPORTING
FILELENGTH =
HEADER =
tables
data_tab = IT_UPLOAD
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.
*CALL FUNCTION 'GUI_UPLOAD'
EXPORTING
FILENAME = 'C:/VENDOR1.TXT'
FILETYPE = 'DAT'
TABLES
DATA_TAB = IT_UPLOAD.
CALL FUNCTION 'BDC_OPEN_GROUP'
EXPORTING
CLIENT = SY-MANDT
GROUP = 'SRR'
USER = SY-UNAME.
POPULATE INTERNAL TABL
LOOP AT IT_UPLOAD.
CLEAR IT_BDCDATA.
REFRESH IT_BDCDATA.
PERFORM POPULATE_DATA.
CALL FUNCTION 'BDC_INSERT'
EXPORTING
TCODE = 'XK01'
TABLES
DYNPROTAB = IT_BDCDATA.
ENDLOOP.
*& Form POPULATE_DATA
text
--> p1 text
<-- p2 text
FORM POPULATE_DATA .
PERFORM GETDATA USING 'X' 'SAPMF02K' '0100'.
perform getdata using ' ' RF02K-LIFNR 'IT_UPLOAD-LIFNR'.
perform getdata using ' ' RF02K-bukrs 'IT_UPLOAD-bukrs'.
perform getdata using ' ' RF02K-EKORG 'IT_UPLOAD-EKORG'.
perform getdata using ' ' RF02K-KTOKK 'IT_UPLOAD-KTOKK'.
PERFORM GETDATA USING 'X' 'SAPMF02K' '0110'.
perform getdata using ' ' LFA1-ANRED 'IT_UPLOAD-ANRED'.
perform getdata using ' ' LFA1-NAME1 'IT_UPLOAD-NAME1'.
perform getdata using ' ' LFA1-SORTL 'IT_UPLOAD-SORTL'.
perform getdata using ' ' LFA1-LAND1 'IT_UPLOAD-LAND1'.
PERFORM GETDATA USING 'X' 'SAPMF02K' '0210'.
perform getdata using ' ' LFB1-AKONT 'IT_UPLOAD-AKONT'.
perform getdata using ' ' LFB1-FDGRV 'IT_UPLOAD-FDGRV'.
PERFORM GETDATA USING 'X' 'SAPMF02K' '0215'.
perform getdata using ' ' LFB1-ZTERM 'IT_UPLOAD-ZTERM'.
PERFORM GETDATA USING 'X' 'SAPMF02K' '0220'.
perform getdata using ' ' LFB5-MAHNA 'IT_UPLOAD-MAHNA'.
PERFORM GETDATA USING 'X' 'SAPMF02K' '0310'.
perform getdata using ' ' LFM1-WAERS 'IT_UPLOAD-WAERS'.
ENDFORM. " POPULATE_DATA
*& Form GETDATA
text
-->P_0213 text
-->P_0214 text
-->P_0215 text
FORM GETDATA USING VALUE(P_0213)
VALUE(P_0214)
VALUE(P_0215).
IF P_0213 = 'X'.
IT_BDCDATA-PROGRAM = P_0213.
IT_BDCDATA-DYNPRO = P_0214.
IT_BDCDATA-DYNBEGIN = P_0215.
ELSE.
IT_BDCDATA-FNAM = P_0214.
IT_BDCDATA-FVAL = P_0215.
ENDIF.

Answer 1

When u use GUI_UPLOAD, U can not assign file type as 'dat'. This must be either ASC or BIN.
Make sure  ur flat file path should correct..
This well help u...