There are several reasons why you may not be able to enroll:
- You do not meet the published prerequistes, or WebReg is unable to recognize that you do meet the prerequisites (common if the prerequisite was taken at another college).
- You do not satisfy one of the restrictions placed on the course. Major and school restrictions are common as are 'NOR' (New-Only Reserved), seats reserved for first time students. Check the comments in WebSOC for details.
- The course is full or it conflicts with another course you are already enrolled in. Look for an alternate time or add yourself to the waitlist. You may also be trying to exceed your approved number of units.
In all cases, you can contact the department or school that offers the course for assistance. For engineering courses, students having problems with a prerequisite or restriction may fill out an online request for Course Authorization.
Freshmen often have trouble enrolling in physics, which requires enrolling in the math corequisite first, then the physics lab, then the physics lecure. Check the comments for details.