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. P.S. Sorry for sending so many emails. I am, as far as I know, the only person doing this in my area of Fermi (on NT). I can go away if enough of you ask!
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