When you get an enrolment error message in Quest (see common error messages) during the Drop/Add Period, you'll ultimately need to do one of three things, depending on the error message:


Every faculty or academic unit handles override requests differently. Review the following information if it is applicable:

Faculty of Applied Health Science (AHS) courses: Complete the Course Override Form, have it signed by the course instructor, then submit it to the appropriate academic unit coordinator:

  • Recreation and Leisure Studies: Sara Houston in BMH 2201, ext. 33530
  • Kinesiology: Janet Coulter in BMH 3025, ext. 36363
  • Health Studies: Submit completed form with instructor signature directly to The Centre.

Faculty of Arts courses: See the Arts enrolment problems and course overrides web page.

Faculty of Engineering courses: Contact your academic advisor.

Faculty of Environment courses: Email the appropriate Environment advisor.

Faculty of Science: See the Science course enrolment problems web page.


Common enrolment error messages

Error message What it means What to do
Available seats are reserved The portion of the class’s enrolment that is reserved for a particular group of students is full and you don't meet the reserve capacity requirements. This designation appears on the Schedule of Classes, directly beneath each section that has a reserve capacity assigned. In special circumstances, the instructor may override the reserve cap to allow a student to enrol. Course Override Form: Ask the individual (see above) to select “Override Class Limit”
Class is full There is no more room for student enrolment in the class. In special circumstances, the instructor may override the limit to allow you to enrol. Course Override Form: Ask the individual (see above) to select “Override Class Limit”
Department Consent Required You need special permission from the academic unit which is offering the course to enrol in this class. Course Override Form: Ask the individual (see above) to select “Override Permission”
Instructor Consent Required You need special permission from the instructor to enrol in this class. In special circumstances, the instructor may override permission to allow you to enrol. Course Override Form: Ask the individual (see above) to select “Override Permission”
Missed deadline You are making changes to your schedule after the deadline for adding or dropping classes has passed. Contact your academic advisor.
Requisites have not been met

The course has prerequisites and/or corequisites that have not been met to enrol in the specified class, OR you have taken an antirequisite course previously.

Prerequisites: There is another course that you must successfully complete before you can enrol in the course you are trying to select. In special circumstances, the instructor may override prerequisites to allow you to enrol.

Corequisites: There is another course that you must take at the same time as the course you have selected (since you didn't take it in a previous term). In special circumstances, the instructor may override the course corequisite.

Antirequisite: A course that cannot be taken if the other specified course has already be taken.

Check the listed requisites in the Undergraduate Calendar to determine what is missing or if you've taken an antirequisite.

For prerequisite and corequisite issues: Course Override Form: Ask the individual (see above) to select “Override Requisites”

For antirequisite issues: Contact your academic advisor.

Term maximum exceeded You have tried to enrol in more courses than you are permitted to take in one term (unit load). In special circumstances, your academic advisor or Faculty may override the unit load to allow you to enrol. Contact your academic advisor.
Time conflict

The times for at least two of your classes overlap (class number indicated).

Test slot conflict: Sometimes a test slot for midterms is one of the components for a course. These slots are for one day only, but will create a conflict if you select a class that is held at the same time (see guidelines on tests during the formal lecture period).

Select a different section or a different course so that you can avoid the conflict.

Test slot conflict: In special circumstances, an instructor may override time conflicts to allow you to enrol. If you feel you have a strong case for taking both courses, ask your instructor to select “Override Time Conflicts”