I have a very simple PAD flow that launches excel, opens an xls file and then saves it as xlsx. This works, but I want to address the scenario where the file is not found. There are a number of different ways that I could handle this, but they all come down to the same problem, which is that everything comes to a grinding halt when Excel gives you a popup box acknowledging that the file cannot be found. You have to click okay to move to the next step in the flow (even on block error), but these boxes only appear when the flow is running. When I stop the flow, they go away, so I cannot use any of the UI automation actions to look for the box. I've tried generating the popup boxes in other ways, but they aren't the same. I have also tried using On Block Error, as well as On error in the Launch Excel action. No error handling moves forward until the okay box is clicked during the flow and the box is gone when I stop the flow. I can't figure out how to work that into the automation. Thanks in advance.