The department offering the course requires approval from one of its advisers before you can register.
The course only accepts students in specific class levels, such as sophomores and above. You must receive approval from the course's instructor before you can register for the course.
The course has reached maximum enrollment and it doesn't have a waitlist. In these cases, we recommend registering for an alternate course.
The course is restricted to either allow or block students admitted to specific college(s) within the University. For example, Colorado Women's College courses only allow students to register who have been admitted to the Women's College. Some college restriction errors may be overridden with appropriate approvals. Contact the Office of the Registrar with specific course and college restriction questions.
Continuous Enrollment Form
The course requires that you register for a specific course at the same time (during the same registration transaction). Check with the department offering the course to find out what the co-requisite is.
Daniels Student Services
The course requires approval from either the Daniels College of Business' Graduate Student Services Department or the Undergraduate Programs Advising Department.
The course requires special approval from the dean of the college/school. Contact the department offering the course to get this approval or visit Registration Approvals page for more information.
The course restricts registration to only students admitted into a specific degree program. This is most common on graduate-level classes restricted specifically to courses in a PhD program.
You must receive department approval to register for the course. Approval can be given on an add/drop slip and submitted to the Office of the Registrar.
Editor (Sturm College of Law only)
The course requires approval from a journal editor.
Field of Study
The class restricts registration to only students within specified majors, minors or concentrations. Check your Degree Audit to ensure you've officially declared your major. If you haven't declared a major, you must get instructor approval.
Independent Study Form
The class requires that you submit an Independent Study Form to the Office of the Registrar to register. These forms are required for independent studies, independent research, directed studies and additional specific research courses.
You must get the class instructor's approval before registering. Instructors can provide this approval online through PioneerWeb or by signing add/drop slips that can be submitted to the Office of the Registrar. Visit Registration Approvals page for more information.
Internship Office (rare)
An internship (Experiential Learning form ) must be completed before you can register for the course.
You must register for this class through the Office of Special Programs because it requires travel. Call 303-871-2360 for specifics about the course, any potential deposit requirements and to register.
The course only accepts students in specific class levels (i.e., graduate versus undergraduate). You cannot earn credit for courses offered outside your current class level without receiving special approval—via the Center for Academic Advising (undergraduates) or via an appeal to the Office of Graduate Studies (graduates).
You've registered for a course but failed to register for its accompanying lab or lecture. You'll find this error predominantly with science courses. With linked lectures and labs, both CRNs must be selected and submitted in the same registration transaction.
You've registered for a course for which you haven't completed prerequisites. Note: We don't consider study abroad and some transfer credits when confirming whether you've satisfied prerequisites. If you think you've unjustly received this error, work with the class' instructor. He/She can provide override the error online by signing an add/drop slip, which you can submit to the Office of the Registrar.
The course is restricted to students admitted to a specific program. These are used primarily for graduate courses and programs. If you receive this error, contact the department offering the course to get registration approval.
You've already received credit for the course—because you've already taken and received a passing grade for the course, or its equivalent, via transfer credit. If you passed a course but the grade you received was too low to count toward your major, you may retake it with instructor approval.
Study Abroad/Int'l Office
You must get approval from the Study Abroad/Office of Internationalization before you can register for the course.
You've registered for a course that meets at the same time as another you've already added to your schedule. You can work with instructors of both courses to find a solution. If the final exam meeting times for these courses conflict, contact the Office of the Registrar.
The course is currently full and has a waitlist or, if seats are available, they are already reserved for students on the waitlist.