I am trying to use the TChain and AddFriend methods. This is what I do:
TChain *chainbm = new TChain(“bmtree”);
chainbm->Add(“beam_info.root”);
TChain chainsr = new TChain(“NtpSt”);
chainsr->Add("/plvm/debdatta/real_neardata/mar_2005/N00006696.root");
chainsr->AddFriend(“chainbm”); or
chainsr->AddFriend(“bmtree”);
None of them seem to work, I get an error message:
Unknown TChain bmtree or
Unknown TChain chainbm
Both the chains have the same number of entries.
- thanks Debdatta.