Hi ,
Thanks for the valuable inputs 
.
I dont have any file name. i have data in binary format and that data i have to upload in Apllication server.
DATA : zbin type xstring.
DATA: file TYPE string VALUE 'application_server_path',
ZBIN1 TYPE STRING,
result TYPE string.
TYPES : BEGIN OF ty_bin ,
field TYPE x,
END Of ty_bin.
DATA : lt_bin TYPE STANDARD TABLE OF ty_bin,
ls_bin TYPE ty_bin.
CALL FUNCTION 'SSFC_BASE64_DECODE'
EXPORTING
B64DATA = '12we'
* B64LENG =
* B_CHECK =
IMPORTING
BINDATA = zbin
* EXCEPTIONS
* SSF_KRN_ERROR = 1
* SSF_KRN_NOOP = 2
* SSF_KRN_NOMEMORY = 3
* SSF_KRN_OPINV = 4
* SSF_KRN_INPUT_DATA_ERROR = 5
* SSF_KRN_INVALID_PAR = 6
* SSF_KRN_INVALID_PARLEN = 7
* OTHERS = 8
.
IF SY-SUBRC <> 0.
* Implement suitable error handling here
ENDIF.
CALL FUNCTION 'SCMS_XSTRING_TO_BINARY'
EXPORTING
BUFFER = zbin
* APPEND_TO_TABLE = ' '
* IMPORTING
* OUTPUT_LENGTH =
TABLES
BINARY_TAB = lt_bin
.
IF sy-subrc EQ 0.
DELETE DATASET FILE.
ENDIF.
* ZBIN1 = ZBIN.
OPEN DATASET file FOR OUTPUT IN BINARY MODE
.
LOOP at lt_bin INTO ls_bin.
* WITH SMART LINEFEED.
TRANSFER ls_bin-field TO file.
CLEAR : ls_bin.
ENDLOOP.
CLOSE DATASET file.
Please have a look at the code and help.
Regards,
Akriti