Hi Thomas, I do not understand how you can get a seg. fault in your TSelector Begin if the only thing you do is m_Hadrons_Lab = new TObjArray; m_Hadrons_Labs->Delete(); The second statement being useleless, you have probably this statement somewhere else. Could you clarify your mail? if possible, sending a real piece of code that we can test ourselves? Which version of Root are uou using? Rene Brun Thomas Schoerner wrote: > > Dear rooters, > > I am running into the following problem. I have an TObjArray (of > TLorentzVectors) which I initialise in the Begin method: > > m_Hadrons_Lab = new TObjArray; > > in ProcessCut I delete, for safety > > m_Hadrons_Lab->Delete(); > > and fill > > for( ... some loop ... ) > { > m_Hadrons_Lab->Add(new > TLorentzVector(p1,p2,p3,p4); > } > > I perform further operations on this array in processFill and ProcessCut > (looping, printing etc.), ut nothing serious. > > In Terminate, I finally delete: > > m_Hadrons_Lab->Delete(); > delete m_Hadrons_Lab; > > Since some time I get a seg fault in the Begin method where I try to do > the ->Delete() ... Studying the array directly before the Delete() command > shows that it is 'healthy' and contains the elements given to it in the > previous ProcesFill call ... > > Can anybody tell me what is going on here ? > > Cheers, and thanks, > > Thomas > > +-------------------------------------------------------------------+ > | Thomas Schoerner-Sadenius schorner@mail.desy.de | > | Universitaet Hamburg, Institut fuer Experimentalphysik | > | Luruper Chaussee 149 phone 0049-40-8998-2954 | > | D-22761 Hamburg room 67b / 5 | > +-------------------------------------------------------------------+
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