RE: problem on ROOT I/O with TClonesArray of TVector3

From: Philippe Canal <>
Date: Thu, 02 Feb 2006 13:09:23 -0600


I can reproduce this problem and will try to implement a solution.

Thanks for reporting it.

-----Original Message-----
From: [] On Behalf Of Hajime Nanjo
Sent: Thursday, February 02, 2006 4:37 AM To:
Subject: [ROOT] problem on ROOT I/O with TClonesArray of TVector3

Dear ROOT developers,

A class named "B" has a member "fA", which is a TClonesArray of a class "A". The class "A" has two members, "int val" and "TVector3 tv".

I succeeded in ROOT I/O with the class "B" but found a strange behavior as follows.

Two operations,  "tree->Draw("")"
and              "tree->Draw("")"
return the same result as expected.

But "tree->Draw("","B.fA.val==1")" returns a wrong result,
which is differ from the result of

Could you fix the strange behavior?

I use ROOT version 5.09/01 under Scientific Linux 4.1. The source file are attached.
The usage is as follows.

tar xvzf test.tgz
cd test

root [0] .x draw.C

Best Regards,

	Department of Physics, Kyoto University
				Hajime Nanjo
Received on Thu Feb 02 2006 - 20:13:10 MET

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