Hi all, I have this problem: in my c++ code I have done a tree in which some of branchs are variables of type TLorentzVector. {... TLorentzVector *p4datrad = new TLorentzVector(); TLorentzVector *p4dateta = new TLorentzVector(); TLorentzVector *p4datetasys_pim = new TLorentzVector(); TLorentzVector *p4datetasys_pip = new TLorentzVector(); TLorentzVector *p4datetasys_piz = new TLorentzVector(); TTree *tdat = new TTree("tdat","Tree for resolution"); tdat->Branch("p4datrad" ,"TLorentzVector" ,&p4datrad); tdat->Branch("p4dateta" ,"TLorentzVector" ,&p4dateta); tdat->Branch("p4datetasys_pim","TLorentzVector" ,&p4datetasys_pim); tdat->Branch("p4datetasys_pip","TLorentzVector" ,&p4datetasys_pip); tdat->Branch("p4datetasys_piz","TLorentzVector" ,&p4datetasys_piz); for (Int_t jentry=0; jentry<nentries;jentry++) ... } If by cint I do: tdat->Draw("p4dateta.fE") or Draw("p4dateta.fP.fX") or draw other variables I haven't any problem ( all variables are draw exactly) but if I want use the TBrowser for draw some of variables of type TLorentzVector (the sames above) the browser draw always the same picture (that related at first variable in the code-program "p4datrad") for all my variables TLorentzVector (my procedure in this case is: open TBrowser, click on the leaf p4dateta, after click on p4daeta root see to me 2 leaf "fE and fP" cliking on fE it draw the plot of p4datrad.fE and so for any variables). My root version is 3.02/06 and I use a sun enterpise 250. Regards Francesco.
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