sap 问题

sap代码：


DATA : BEGIN OF man,
  name(20) TYPE C,
  high TYPE p DECIMALS 2,
  weight TYPE p DECIMALS 2,
END OF man.

DATA : man1 LIKE TABLE OF man.
DATA : name TYPE rlgrap-filename,
       typa TYPE rlgrap-filetype.


man-name = '张叁'.
man-high = '1.68'.
man-weight = 120.
INSERT man INTO TABLE man1.

man-name = '刘志'.
man-high ='1.78'.
man-weight = 160.
INSERT man INTO TABLE man1.


man-name = '李志'.
man-high = '1.58'.
man-weight = 110.
INSERT man INTO man1 INDEX 2.

name = 'c:\temp\testa.txt'.
typa = 'dat'.

call function 'DOWNLOAD'
  EXPORTING
    "codepage                = 'testa'
    filename                = name
    filetype                = typa
    item                    = '文件测试'
  TABLES
    data_tab                = man1
  EXCEPTIONS
    invalid_filesize        = 1
    invalid_table_width     = 2
    invalid_type            = 3
    no_batch                = 4
    unknown_error           = 5
    gui_refuse_filetransfer = 6
    others                  = 7.

if sy-subrc <> 0.
*   MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
*           WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4
ENDIF.



错误信息：  如下error.jpg图片