RE: TChain -> Merge()

From: Philippe Canal <>
Date: Fri, 18 Feb 2005 12:45:22 -0600


Can you provide me with a way to reproduce this problem?


-----Original Message-----
From: [] On Behalf Of Giovanni Franzoni
Sent: Friday, February 18, 2005 10:40 AM To: roottalk
Subject: [ROOT] TChain -> Merge()

Hi Rooters,

I am trying to merge trees of the same kind which sit in different (smaller) files into one.

Sorry, I know this issue has already been proposed in the past but I was not able to find the reply to noeding (<merging root files>, Fri May 28, 2004 14:04).

I use a TChain and:


crashes, while


gives me a final file whose size is roughly one hundred times bigger than the sum of the initial smaller files.
I have tried both with uncompressed and compressed (level 9 files). I tried with several releases, for instance v4.02.00/rh73_gcc296/.

        What am I doing wrong?

                Thanks, regards, Giovanni Received on Fri Feb 18 2005 - 19:49:36 MET

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