Download several large files - get CONTROL_FLUSH_ERROR

Dear all,
I want to download several large files from the application server to frontend with function module GUI_DOWNLOAD. I use a loop over the several filenames and download the files with following code:
DATA: l_append        TYPE as4flag,
             l_count         TYPE i,
             l_max           type i    value 50000,
             ls_ziel         TYPE string,
             ls_download_txt LIKE LINE OF gt_download_txt,
             lt_download_tmp LIKE gt_download_txt.
CONCATENATE p_front gs_sel_table-selname '.' 'txt' INTO ls_ziel.
IF NOT gt_download_txt[] IS INITIAL.
    LOOP AT gt_download_txt INTO ls_download_txt.
      APPEND ls_download_txt TO lt_download_tmp.
      IF l_count = l_max.
CALL of FUNCTION MODUL GUI_DOWNLOAD
        REFRESH lt_download_tmp[].
        CLEAR l_count.
        l_append = 'X'.
      ENDIF.
      l_count = l_count + 1.
    ENDLOOP.
If I only download one large file, there is no problem. But when I want to download more then one file the function module returns the error CONTROL_FLUSH_ERROR.
I can not say at which file the error occurs (2nd, 3rd, ...) I think it depends on the file size. Several smaller files are no problem. At two large files I get the error.
Does anyone has an idea?
Kind regards,
Sven

Hi,
Please check this thead perhaps it may help.
Re: CONTROL_FLUSH_ERROR with GUI_DOWNLOAD
Regards,
Ferry Lianto

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