[ROOT] write a big Tree in a TFile

From: Matthieu Lechowski (lechowsk@lal.in2p3.fr)
Date: Fri Sep 26 2003 - 16:58:52 MEST


Hello,

ROOT leaves without saying anything when I try to write a TTree in a
TFile, and the file has only few bytes (and can not be opened of
course).

I have a global tree: TTree TREE("T","TREE");
In a function, I fill it, then:
 TFile *myfile=new TFile(name_ntuple, "RECREATE");
 TREE.Write();
 myfile->Close();

This is the way I always used, and it always worked, but this time I
have a big Tree and this doesn't work, I don't know why.
Its size is less than the limit 2Gb, I think it should be around 80Mb
with 100.000 entries (I have already a similar file of 8Mb with 10.000
entries that I succeeded to write).

Have you an idea of what goes wrong ?
Thank you.

	Matthieu Lechowski
	LAL Orsay

lxplus
ROOTSYS=/afs/cern.ch/sw/root/v3.05.05/rh73_gcc2952/root



This archive was generated by hypermail 2b29 : Thu Jan 01 2004 - 17:50:15 MET