Gordon Watts (Brown University) wrote: > > Hi, > I've got a macro file I can only execute once in ROOT... that is, I need > to exit and enter root to get it to run correctly the second time. > Basically, I open a file and get a handle on a branch of a tree. The second > time through it bombs on the T.GetBranch (no such symbol)... > > { > TFile f("output.root"); > TTree *R = (TTree *) f.Get("T"); > TBranch *b = T.GetBranch("event"); > } > > Cheers, > Gordon. > Two points. 1- You should change (typo?) the statement TTree *R = ... to TTree *T = ... 2- If you intend to invoke this macro several times in one session, you better do: TFile *f = new TFile(.. TTree *T = (TTRee*) f->Get("T"); and may be insert the statement gROOT->Reset() as first statement. Rene Brun
This archive was generated by hypermail 2b29 : Tue Jan 04 2000 - 00:26:21 MET