When I try to scan I get an error message that reads "This form is for an assignment you don't have access to or has been trashed." Then it will follow up with "you've already scan this form..."
It is scanning just fine for the teacher next door and we are using the same form. I took one of my kid's scans to his computer and used one of his student's gradecam codes and it scanned just fine. What is the problem?