Last Exception for degree_tracker

I was able to fix this with a mod. I could not fix it by deleting all townies and residents of Brightchester. I think the problem was linked to my household sim and I couldn't delete her of course. There are 2 places in the code that I had to fix.

For some reason, the progress_stat returned is NoneType. This is probably due to an invalid assignment of an organization like I was describing in my how to reproduce post. Just setting the points_to_current_rank to 0 allows the function to complete. Since it's removing the organization, I don't see any side effects of this.

organizations.organization_tracker.
  OrganizationTracker.leave_organization
    if progress_stat is None:
      tracker.set_value(progress_stat_type, 0)
    else:
      tracker.set_value(progress_stat_type,
        progress_stat.points_to_current_rank())

Another problem was a sim was enrolled in university, but somehow had no courses. This creates the division by zero error. I just set the term gpa to 0 if there were no courses. This allowed the complete term function to run.

sims.university.degree_tracker.
  DegreeTracker.complete_term
    if len(self._course_infos) == 0:
      term_gpa = 0.0
    else:
      term_gpa = round(term_grade_point /
        len(self._course_infos), 2)

After running this mod once, saving and deleting the mod, I am seeing no more LE's.