Downloading files to PC(Presentation Server)

*   Download internal table to presentation server file(PC)
  DATA: ld_filename TYPE string,
* Pre version 4.7 declaration e_file like rlgrap-filename.
  DATA: begin of it_datatab occurs 0,
  row(500) type c,
 end of it_datatab.
  call function 'GUI_DOWNLOAD'
       exporting
            filename         = ld_filename
            filetype         = 'ASC'
       tables
            data_tab         = it_datatab[]
       exceptions
            file_open_error  = 1
            file_write_error = 2
            others           = 3.

*   Download internal table to presentation server file(PC)
*   Separating fields/columns by a tab
  DATA: ld_filename TYPE string,
* Pre version 4.7 declaration e_file like rlgrap-filename.
  DATA: begin of it_datatab occurs 0,
  col1(50) type c,
  col2(50) type c,
  col3(50) type c,
*       etc....
 end of it_datatab.
  CALL FUNCTION 'GUI_DOWNLOAD'
   EXPORTING
        filename         = ld_filename
        filetype         = 'ASC'
*       APPEND           = 'X'
        write_field_separator = 'X'
*       CONFIRM_OVERWRITE = 'X'
   TABLES
        data_tab         = it_datatab[]
   EXCEPTIONS
        file_open_error  = 1
        file_write_error = 2
        OTHERS           = 3.