Hoi Henning, > How did you check the number of unmatched tracks and neutrals? I looked at a signal file and compared the matched to the total: root [0] TFile f("/nfs/babar/recoil/prod2004/output/vub-signal/SP-3617/BSemiExclKanSP-3617-run1a-1.root") ... root [11] ntp1->Draw("idGam", "IndexGam > -1", "goff") (Int_t)6062 root [12] ntp1->Draw("idGam", "", "goff") (Int_t)7656 Cheers, --U.