Problem writing file to FTP

Question

whan i am writing the file to FTP in foreground it is working fine.but in backgruond it is failing .what would be the problem...

Answer 1

i using the below code..
FORM ftpfinanceaccess_download USING    p_host
                                        p_user
                                        p_password.
  DATA  :
          dest LIKE rfcdes-rfcdest VALUE 'SAPFTP',
          compress TYPE c VALUE 'N',
          host(64) TYPE c.
  DATA: hdl TYPE i.
  DATA: BEGIN OF result OCCURS 0,
        line(100) TYPE c,
        END OF result.
  DATA : key TYPE i VALUE 26101957,
         dstlen TYPE i,
         blob_length TYPE i.
  host = p_host .
  DESCRIBE FIELD p_password LENGTH dstlen IN CHARACTER MODE.
  CALL 'AB_RFC_X_SCRAMBLE_STRING'
    ID 'SOURCE'      FIELD p_password    ID 'KEY'         FIELD key
    ID 'SCR'         FIELD 'X'    ID 'DESTINATION' FIELD p_password
    ID 'DSTLEN'      FIELD dstlen.
  CALL FUNCTION 'FTP_CONNECT'
    EXPORTING
      user            = p_user
      password        = p_password
      host            = host
      rfc_destination = dest
    IMPORTING
      handle          = hdl
    EXCEPTIONS
      not_connected   = 1
      OTHERS          = 2.
  IF sy-subrc = 0.
    CONCATENATE 'cd' ftppath INTO ftppath SEPARATED BY space .
    CALL FUNCTION 'FTP_COMMAND'
      EXPORTING
        handle        = hdl
        command       = ftppath
      TABLES
        data          = result
      EXCEPTIONS
        command_error = 1
        tcpip_error   = 2.
    IF sy-subrc = 0 .
      CLEAR result .
      REFRESH result .
      CALL FUNCTION 'FTP_COMMAND'
        EXPORTING
          handle        = hdl
          command       = 'ascii'
        TABLES
          data          = result
        EXCEPTIONS
          command_error = 1
          tcpip_error   = 2.
      IF sy-subrc = 0 .
        DESCRIBE TABLE iresult LINES lines.
        blob_length =  lines * width .
        clear : lines.
Delete the existing file
     CONCATENATE 'del' ftpfile INTO delfile SEPARATED BY SPACE.
      CALL FUNCTION 'FTP_COMMAND'
        EXPORTING
          handle        = hdl
          command       = delfile
        TABLES
          data          = result
        EXCEPTIONS
          command_error = 1
          tcpip_error   = 2.
*End of deleting the existing file
        CALL FUNCTION 'FTP_R3_TO_SERVER'
          EXPORTING
            handle        = hdl
            fname         = ftpfile
            blob_length   = blob_length
            CHARACTER_MODE = 'X'
          TABLES
            TEXT          = iresult
          EXCEPTIONS
            TCPIP_ERROR   = 1
            COMMAND_ERROR = 2
            DATA_ERROR    = 3
            OTHERS        = 4.
        IF sy-subrc <> 0 .
          WRITE 'Error in writing file to ftp' .
        ELSE.
          WRITE 'File downloaded on the ftp server successfully'.
        ENDIF.
      ENDIF.
    ELSE.
      WRITE : 'Path on ftp not found : ' , ftppath .
    ENDIF.
    CALL FUNCTION 'FTP_DISCONNECT'
      EXPORTING
        handle = hdl.
    CALL FUNCTION 'RFC_CONNECTION_CLOSE'
      EXPORTING
        destination = 'SAPFTP'
      EXCEPTIONS
        OTHERS      = 1.
  ELSE.
    WRITE 'Could not connect to ftp' .
  ENDIF.