RE: [ROOT] error wtih the tree name in creating a TChain

From: Philippe Canal (pcanal@fnal.gov)
Date: Mon Jul 28 2003 - 19:22:09 MEST

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Hi,

Use
	chain.StartViewer();
Cheers,
Philippe


-----Original Message-----
From: owner-roottalk@pcroot.cern.ch
[mailto:owner-roottalk@pcroot.cern.ch]On Behalf Of tcli
Sent: Monday, July 28, 2003 11:07 AM
To: roottalk@pcroot.cern.ch
Subject: [ROOT] error wtih the tree name in creating a TChain


Dear root users,
      I tried to creat a TChain to chain 2 trees in 2 root files as
follows:

root{] TChain chain("tt")
root[] chain.Add("file1.root")
root[] chain.Add("file2.root")
root[] tt.StartViewer()

After typing the first 3 lines, nothing wrong happens. That seems the
TChain is created. But after typing the 4th command to view the content
of the TChain, an error appears:
Symbol tt is not defined in current scope  FILE:(tmpfile) LINE:1  
Failed to evaluate tt.StartViewer.......

I've checked the tree name of both trees separately before with the Tree
Viewer. So I'm very sure the name is "tt". So is there anything I can do
to solve this problem?

Thank you very much!

Lesley

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