Re: [ROOT] Chain and MakeClass Problem

From: Dan Krop (dkrop@indiana.edu)
Date: Tue Mar 04 2003 - 18:24:37 MET


Hi,
	I tried 3.05/02 and the behavior is the same.  I've made an even
simpler example which requires no external shared libs.  It is on the
same website:

http://dustbunny.physics.indiana.edu/~dkrop/root_problems

Note that the location of the ntuple files must be correctly declared in
the header file before testing.  I would be interested if anybody can
reproduce the behavior I have seen.

			Thanks again,
				Dan

On Tue, 2003-03-04 at 04:15, Rene Brun wrote:
> Hi Dan,
> 
> I cannot test your system because your external shared lib cannot run on 
> my systems. However, I suggest you move to one of the pro versions 
> 3.03/09, 3.04/02 or the latest version 3.05/02. Problems in some 
> conditions when moving to a new file in a TChain were fixed in these 
> versions.
> 
> Rene Brun
> 
> On 3 Mar 2003, Dan Krop wrote:
> 
> > Hello,
> > 	I'm seeing some unexpected behavior when using the MakeClass method on
> > a TChain.  I'm using RH 7.3.  One of the files in the chain was created
> > with version 3.03/04 and the other with 3.03/07.  When I chain them
> > together on the machine with 3.03/04, do a MakeClass, and then run the
> > analysis loop, it seems to not find the correct entries in the tree when
> > it gets to the 2nd file- it gives random numbers for branch entries in
> > those events.  Since the ntuples are rather large and there is a
> > necessary supporting library, I've created a web page with links to
> > download all the files needed to reproduce this problem.  The page is
> > at:
> > 
> > http://dustbunny.physics.indiana.edu/~dkrop/root_problems
> > 
> > Note that when each file is analyzed separately, i.e. not in a TChain,
> > no problems are found.
> > 
> > 				Thanks in advance,
> > 						Dan
> > 



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