'WS_DOWNLOAD' Function module is obsolete in ECC6, so we have to use Function Module 'GUI_DOWNLOAD'
* to download the internal table data into excel format
* downloading a file for example pdf file to presentation server we use FM 'GUI_DOWNLOAD'
* CALL FUNCTION 'WS_DOWNLOAD'
* EXPORTING
* CODEPAGE = 'IBM'
* FILENAME = FILE
* FILETYPE = 'ASC'
* TABLES
* DATA_TAB = DATA_TAB
* EXCEPTIONS
* FILE_OPEN_ERROR = 1
* FILE_WRITE_ERROR = 2
* INVALID_FILESIZE = 3
* INVALID_TABLE_WIDTH = 4
* INVALID_TYPE = 5
* NO_BATCH = 6
* UNKNOWN_ERROR = 7.
*DATA DECLARATION for GUI_DOWNLOAD.
DATA : lv_filename type STRING.
lv_filename = file.
CONSTANTS: LV_FILETYPE TYPE CHAR10 VALUE 'ASC'.
CALL FUNCTION 'GUI_DOWNLOAD'
EXPORTING
FILENAME = lv_filename
FILETYPE = 'ASC'
CODEPAGE = 'IBM'
TABLES
DATA_TAB = DATA_TAB
EXCEPTIONS
FILE_WRITE_ERROR = 1
NO_BATCH = 2
GUI_REFUSE_FILETRANSFER = 3
INVALID_TYPE = 4
NO_AUTHORITY = 5
UNKNOWN_ERROR = 6
HEADER_NOT_ALLOWED = 7
SEPARATOR_NOT_ALLOWED = 8
FILESIZE_NOT_ALLOWED = 9
HEADER_TOO_LONG = 10
DP_ERROR_CREATE = 11
DP_ERROR_SEND = 12
DP_ERROR_WRITE = 13
UNKNOWN_DP_ERROR = 14
ACCESS_DENIED = 15
DP_OUT_OF_MEMORY = 16
DISK_FULL = 17
DP_TIMEOUT = 18
FILE_NOT_FOUND = 19
DATAPROVIDER_EXCEPTION = 20
CONTROL_FLUSH_ERROR = 21
OTHERS = 22.
file = lv_filename.