Hello, I produced a bunch of ntuples VubRecoilUser ntuples with 30000 events, using the tcl files made with BbkDatasetTcl -ds dataset -tcl 30000 --splitruns Then I take an ntuple and look at it in root: root [31] TFile f("data/SP-1235-BSemiExcl-R18b-1.root"); root [32] ntp1->GetEntries() (const Long64_t)2574210 That is much more than 30000 entries. Obviously the number of entries is not the same as the number of events. So what does the number of entries tell me? Thanks, sheila