In Moodle 2.16, I was trying to delete a student's assignment that was uploaded to the dropbox. I was able to go through the motions of deleting it but it wanted me to upload another file. So unless I added a new file, it wouldn't let me delete the old one.
Is there a way in 2.16 to remove required field option for assignment uploads so that you can delete an uploaded file from a dropbox without having to replace it? NOTE: I did have the dropbox set to “Allow deleting” but I still couldn't delete the file without replacing it with another.