The most common reason is due to reserved quota for specified students. System will reject course enrolment if there is no available quota, but the quota partition information is not displayed in “message” under CUSIS.
Information on quota partition can be found from “Teaching Timetable by Subject / Department”.
Other reasons include reaching your maximum course load, the number of courses allowed to register in one term (e.g. a maximum of 2 classes of University General Education Courses, 1 class of elective Physical Education Course). Please note that class in the waiting list is also counted towards the total number of classes allowed to be taken. You need to drop from the waiting list if you need to take other course with vacancy.
