There are always reasons beyond your control such as an unforeseen overlap with another seminar, changes in your work schedule, etc. You can always approach a course organizer after the matching in case you have not been assigned, but you should have a convincing reason why she/he should accept you even after the matching.

If indeed you submitted many preferences and no course seat has been assigned to you, and no course organizer would want to provide another course seat for you, please contact This email address is being protected from spambots. You need JavaScript enabled to view it. and we will help you to find a solution.