The Aurora registration system will send you an error message if you are doing something incorrectly while registering for courses. Keep in mind that when Aurora gives you an error message, it is usually protecting you from making a mistake that could create conflicts in your schedule or compromise your academic plans. So remain calm, and bear in mind that errors can usually be dealt with quite easily. If you are receiving error messages, check the list below for explanations of some of the most common ones you might encounter. If you continue to have troubles registration in Aurora, you may need to review some of the tutorials for online registration.