Dear Rooters, sorry if I add the followings: Why under CINT does work the following code ------------------------------------------------------------------------- //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! TClonesArray *tr=new TClonesArray[2]; tr[0]= new TClonesArray("Track",2); tr[1]= new TClonesArray("Track",2); // !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! new(tr[0][0]) Track(1,2,3,4,5); new(tr[0][1]) Track(6,7,8,9,10); new(tr[1][0]) Track(11,12,13,14,15); new(tr[1][1]) Track(16,17,18,19,110); //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! TClonesArray *TTR = &tr[0]; //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! TIter iter(TTR); Track *UTr = new Track(); while( UTr = (Track*)iter.Next() ) cout<<UTr->a()<<endl; //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! TClonesArray *TTR1 = &tr[1]; ///!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! TIter iter1(TTR1); Track *UTr1 = new Track(); while( UTr1 = (Track*)iter1.Next() ) cout<<UTr1->a() <<endl; ------------------------------------------------------- instead of having the !-marked lines substituted by the 'grammatically' correct following lines ( TClonesArray **tr=new TClonesArray*[2]; /// note: pointer of pointer!!!! TClonesArray *TTR = tr[0]; TClonesArray *TTR1 = &tr[1]; Thank you. Tommaso
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