Hi, Here is my problem : I just want to get back some TH1F from a file and copy them into new fHistos which are data members of a class. Of course when I close the file I get a seg. vio. if I try to use my fHistos I want to do something like this... { gROOT->Reset(); TObjArray *my_array = new TObjArray(10); TH1F *my_th; TH1F *t0; TFile *my_file = new TFile("my_file.root","READ"); t0 = DO A COPY OF [ (TH1F*) my_file->Get("histo_name") ] ; my_array->AddAt( t0,0); my_file->Close(); my_array->ls(); my_array->At(0)->Draw(); } ------------------------------------------------------------- Christophe Suire B204 suire@in2p3.fr Institut de Recherches Subatomiques phone: +33(0)388106154 23,rue du Loess Bat20 BP28 fax: +33(0)388106614 F-67037 Strasbourg cedex2 -------------------------------------------------------------
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