Methods in cl_gui_frontend_services will break the progress indicator

Hi guys,
I have a list of directories of client to check if it exists.
I use cl_gui_frontend_services=>directory_exist method.
And I want to show the progress indicator.
But the method directory_exist will break the indicator, show the status bar's message is like, flashing. appear, disappear, appear, disappear ...
You can use the codes below to see what happens and can take a comparsion when you comment the method directory_exist .
any suggestions?
thanks a lot.
REPORT z_test.
type-POOLs abap.
DATA: A LIKE SY-UCOMM,
    ldf_derectory TYPE string,
    ldf_result     TYPE abap_bool.
ldf_derectory = 'c:\'.
DO 100 TIMES.
DO 300 TIMES.
    GET TIME.
ENDDO.
A(3) = SY-INDEX.
A+3 = '%'.
CALL FUNCTION 'SAPGUI_PROGRESS_INDICATOR'
EXPORTING
    PERCENTAGE = SY-INDEX
    TEXT       = A.
CALL METHOD cl_gui_frontend_services=>directory_exist
EXPORTING
    directory = ldf_derectory
    RECEIVING
    result    = ldf_result.
ENDDO.

Hi,
I'm not sure there is anything you can do about the flashing clock icon in this case. This may just be a limitation of the GUI.
Of course, you always have the option of using 0% as the percentage when calling SAPGUI_PROGRESS_INDICATOR. This will eliminate the clock from the progress display, leaving just the percentage number plus the '%' sign.
In other words, you can eliminate the annoying flickering by changing your function call to:
CALL FUNCTION 'SAPGUI_PROGRESS_INDICATOR'
    EXPORTING
      percentage = 0
      text       = a.
Regards,
Jamie

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Methods in cl_gui_frontend_services will break the progress indicator

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