Originally Posted by inkhawk157
Doesn't work for grad classes
That's because it's not supposed to.
If you actually read the title of the timetable page, it says "Undergraduate
Master Course Timetable Search".
Grad courses are set up quite differently, and the course load of grad students is also very different. Their courses are considered separately from undergrad courses. Even if you search for crosslisted courses on the master timetable, they won't come up if you use the grad code (and they're not listed as 'crosslisted' either). It's strictly for undergrad courses.