Foreground(Download file)- Background (BAPI)- Foreground(results) howto

Question

I have a program that currently:
1) Downloads an industry specific file
2) Converts the file into BAPI_SALESORDER_CHANGE call
3) Displays the result in an ALV Grid.
The problem is that the BAPI_SALESORDER_CHANGE can exceed the dialog workprocess timeout value for any decent sized order.  
We want to:
1) Download the file in the dialog wp.
2) Process the bapi call in the background
3) Awake the dialog process and display the results
1&2 -- np
3 - Problem ->   Using CL_GUI_TIMER.   Appears to work for a certain number of refreshes but the event randomly stops invoking at some point in the future.  
This is some test code I was playing with:   It stops on my system somewhere between 40 and 150 iterations.
*& Report  YNRK8_TIMER_TEST
REPORT  ynrk8_timer_test.
parameters: pa_refrs type i default 1.
DATA: rf_gui_timer TYPE REF TO CL_GUI_TIMER.
*       CLASS lcl_event_handler DEFINITION
CLASS lcl_event_handler DEFINITION.
  PUBLIC SECTION.
    CLASS-METHODS: on_finished FOR EVENT finished OF cl_gui_timer IMPORTING sender.
ENDCLASS. "lcl_event_handler DEFINITION
*       CLASS lcl_event_handler IMPLEMENTATION
CLASS lcl_event_handler IMPLEMENTATION.
  METHOD on_finished.
    STATICS: ltp_refreshed TYPE i.
    DATA:   l_remain TYPE i.
    ADD 1 TO ltp_refreshed.
    l_remain = ltp_refreshed MOD 5.
    IF l_remain = 0.
      WRITE: 'Refresh number:', ltp_refreshed.
    ENDIF.
    sender->run( ).
  ENDMETHOD.
ENDCLASS.
start-of-selection.
create object rf_gui_timer.
set handler lcl_event_handler=>on_finished for rf_gui_timer.
rf_gui_timer->interval = pa_refrs. rf_gui_timer->run( ).
write 'Wait for a while:'.
So I'm either looking for a solution that allows CL_GUI_TIMER to work indefinately OR a better way.   My basis team does not want to dump the dialog work process timeout value at all.

Answer 1

Are you using gui_download in foreground and open dataset in background? U'll get different file size because, by default, gui_download adds CRLF at the end of each line, and open dataset adds only LF. so the foreground file size should be little bigger than the other.
Regards
Sridhar