Hi Travis,
I believe the crashing behavior is caused by CODAP attempting to make 5000 boundaries, one for each case in Office_Traffic_Stops. The solution is to move CMPD_Division to a parent level and then apply your formula, resulting in 15 boundary values. (Actually only 13 since there seems to be one lookup mismatch.) I suspect that you really are interest in mapping the 5000 stops, though. Points with latitude and longitude would serve that purpose extremely well if you have that data. Here is a link to a revised document.