If you have received a “Prerequisite/Test Score Error” when attempting to add one of our courses, make sure you are registering for both lecture and lab together in the same registration transaction. Our lectures and labs have separate course numbers (i.e. CHEM 115 and CHEM 115L, CHEM 233 and CHEM 235, etc.), and the system displays a prerequisite error if you try to add a lecture without a lab, and vice versa. Otherwise, please include all relevant details and check your MIX e-mail regularly. We may need to contact you for further information regarding your situation.