Or you could wait a day or two and send them an email saying there seems to be a problem with your file and try to resend it.
But it is true that there is always someone that's a pain in the ass
Yes @castre there is always someone. And that someone is the student who can't just submit their work on time. Not the professors who are doing their jobs.
But it is true that there is always someone that's a pain in the ass