[ROOT] Chain and MakeClass Problem

From: Dan Krop (dkrop@indiana.edu)
Date: Tue Mar 04 2003 - 03:58:29 MET


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
-- 
Dan Krop <dkrop@indiana.edu>



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