If a student was not able to get into a needed class, he or she should continue to check MyRed to see if it opens up as other students add and drop classes. If the class does not open up, the student may need to talk to his or her advisor to see if another class can be substituted at this time or may need to ask the instructor of the course for an override form. Please remember, though, that not all classes are able to give overrides (seating or equipment may be limited in that particular room or class). In addition, seniors needing a particular class to graduate are generally given priority. In cases where you a class is closed and an override is not an option, students are encouraged to speak with their advisors regarding other options, such as taking a different class this semester.
More details at: http://go.unl.edu/izw