p=10-15 pt=0.7-0.9 positive problem tracks Bad fit 1,2,25,45,53 lost points 3,6,8,27,36,37,72,82, V0 cand. 5,18,35,46,54,64,70,75,83,93,94 low number of points fitted (below 20) 14,29,50,60,90 track 59: two tracks almost identcal negative problem tracks Bad fit 69,84 lost points 2,21,22,58,98 V0 cand. 14,33,44,45,59,60,85, low number of points fitted (below 20) 62,76,90,97 track 21: strange point in VTPC1