Machine Vision

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Flickering the screen

Hi,

  We developed dialogue vi for creating template image. When the template button clicks the dialogue vi will appear (this vi developed using while loop and event structure), and when clicks on select roi button for selecting roi for crop and creating template, at this the screen will starts flickering. I am not able to solve this issue. Please guide me to solve this issue.

Please find the attachment for flickering issue.  

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-The VI is closing opening again(My guess)?
-Check the button values of Cancel and Select ROI are they proper?
-In the video both are true, For cancel button if it's taking true then it might be stopping the vi i guess and it's entering the vi and unable to exit.
Thanks
uday
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