Hi rooters, I try add histogram with the following command TFile f("CommonTotaleM.root") TH1F *h = (TH1F*)f.Get("BASE_ALL_M") h->Add(h) but I get *** Break *** segmentation violation Why? If I try TFile f("CommonTotaleM.root") TH1F *h = (TH1F*)f.Get("BASE_ALL_M") h->Draw() It displays my histogram, but if after I try to execute the following command h->Add(h) I get Error: Symbol h is not defined in current scope FILE:/tmp/filensNVWl_cint LINE:1 *** Interpreter error recovered *** Why? Thank you for your help. Giuseppe.
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