Hi,
I use a TTreeFormula to evaluate a cut in Loop() in the code
from tree->MakeClass() like so:
[code]void tree::Loop()
{ if (fChain == 0) return;
TTreeFormula *cutf= new TTreeFormula(“cutf”,“x>0”,fChain);
Int_t nentries = Int_t(fChain->GetEntriesFast());
Int_t nbytes = 0, nb = 0;
for (Int_t jentry=0; jentry<nentries;jentry++) {
Int_t ientry = LoadTree(jentry);
if (ientry < 0) break;
if ( cutf->EvalInstance() <= 0 ) continue;
nb = fChain->GetEntry(jentry); nbytes += nb;
}
}
[/code]
And then I run this piece of macro:
TChain *chain= new TChain("tree");
chain->Add("rtree1.root");
chain->Add("rtree2.root");
gROOT->LoadMacro("tree.C");
tree t(chain);
t.Loop();
It got segmentation violation when there is more than one file
in the chain. How do I solve this problem? I use 3.10/02.
Chih-hsiang