While using a!recordActionItem() to open a pop-up, there is no close option which is by default by Appian to close the dialog box? What can be the solution?
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Is the process model being launched using a Start Form or is it launching immediately to a chained User Input Task? Appian doesn't publish the exact workings of the "close button" functionality seen (sometimes) on the dialog pop-up, but I suspect the difference might hinge on whether or not a Start Form is used.