I want to show customized confirm dialog box (instead of the Appian default "The Task Couldn't be submitted" message) whenever the user input task is timed out (in our case the exception timer we have kept for UI task is 20 mins).
Also at present when the user clicks OK button in the default dialog box, then the page stays there and either the user have to press F5 to restart the process or have to click on any of the SITE tabs to come out of the screen.
Instead, I have a requirement to come out of the current UI and the system should redirect the user to the page where the process was called from eg., if the process was a related action and one of the UI task timed out, on click of OK button the system should redirect the user to the page where the process was triggered i.e., record summary page.
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BalajiR You can create your popup using refreshvariable refreshinterval. of 20 minute timer, so once timer crosses 20 mins, you can show the popup and hide the old form. So when user submits, you can submit the popup he will navigate to homepage.
This type of workaround you can try, but this will affect your process performance as tasks will be open for long time then it should be.