We have an issue in a process where we have an Upload field in a Form that is required.  That form moves on to an approval.  If approved it moves further, if rejected it goes back to the submitter for modifications.  We find that on the resubmit, the user can actually submit the form without an attachment and get an error vs the normal required field error.  I created a test process to confirm.

1.  Trying to submit the original form with no attachment give the desired results.

2.  I attach a file to the above form and submit it.  The next user task in an approval.  If I reject the task, it sends it back to the submitter where they can fix the info or delete the attachment and attach something new.  If we delete the attachment and hit Submit, instead of stopping it like above, the user gets the following:

Is this intended behavior?  We'd like it to perform like #1 where it simply doesn't allow it in the first place.  I have no problem hitting the back button and doing it right but end users wont read the message.

Thanks,

Chris