Dear rooters,
I have problem with TChain, My tree contain events (UEvent class) with some variables (B, Phi etc.) and Table of TClonesArray that contain particles (UParticle). I try to get some loop over events variables (B,Phi) and if they have some values read entire event with particles. So I wrote constructor of my class that contain
drzewo = new TChain("events");
for(Int_t i =0;i<files_nr;i++){
drzewo->Add(filename[i]);}
uevent = new UEvent();
drzewo->SetBranchAddress("event",&uevent);
//drzewo->GetBranch("event")->SetAddress(&uevent);
drzewo->SetBranchStatus("*",0);
drzewo->SetBranchStatus("fNpa",1);
drzewo->SetBranchStatus("fNes",1);
drzewo->SetBranchStatus("fPhi",1);
drzewo->SetBranchStatus("fB",1);
Later I loop over events by drzewo->GetEntry(i) if its event that I looked for I try to read this by:
Int_t temp = drzewo->LoadTree(lastScanned);
drzewo->GetEntry(temp,1);Unfortunatelly when I try to get some variables from particle (I use uparticle = uevent->GetParticle(j) and uparticle->GetSomething()) I get segfault. But if I don’t use drzewo->SetBranchStatus("*",0); It’s work fine. How you any idea how to force this to work and don’t read entire event?
Thanks for your help.
Daniel