Before an assignment is submitted, make sure a file exists to be submitted. My laptop has the issue of randomly clicking on the screen (Shadow tapping is what others have called the issue on surface laptops). Today it accidentally tapped on submit for a lab assignment before I had the chance to upload anything to the assignment field. A simple check from Labflow would make it so no assignment can be submitted with nothing to uploaded.
Guest
Good suggestion. We are putting this idea into the queue.