CONTROL_FLUSH_ERROR when using 'GUI_DOWNLOAD' Function Module in foreground

Hi,
I am using function module 'GUI_DOWNLOAD' in foreground mode with APPEND = 'X' ( I need to add infomration to file ).
In most of the cases it works good but in some cases ( which I cannot isolate ) - I am getting CONTROL_FLUSH_ERROR exception. Do you have any ideas where can be the problem?
Thanks in advance,
Anna

You will get "CONTROL_FLUSH_ERROR " error when there is some problem with SAP GUI. Check your Gui installation and if possible uninstall the exixting GUI and reinstall the new GUI from fresh.
or you can use the below code
CALL METHOD cl_gui_frontend_services=>gui_download
 EXPORTING bin_filesize = l_xml_size
 filename = 'c:tempflights.xml'
 filetype = 'BIN'
 CHANGING data_tab = l_xml_table
 EXCEPTIONS OTHERS = 24.
 IF sy-subrc <> 0.
 MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
 WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
 ENDIF.

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Message was edited by: Aaron Anthony

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Hi Amit,
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declarations for context navigation
DATA:
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 thanking you.

Hi,
Use WRITE_FIELD_SEPARATOR = 'X'.
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DATA: w_name(90) TYPE c.
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 price
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 FROM sflight
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CONTROL_FLUSH_ERROR when using 'GUI_DOWNLOAD' Function Module in foreground

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