Hi, I'm trying to use TTree::BuildIndex with ROOT 3.04.02 on both Windows XP and Redhat Linux 7.2. I have run into a problem - I am trying to build an index using run number and event id. I have 3 types of ROOT files - I can run BuildIndex just fine on 2 of the 3 types. In the 3rd case, I receive a segmentation violation. In the tests I have done, I have only 14 events in my files. Are there any known problems with TTree::BuildIndex? I did a search on roottalk and found little discussion on this method. I have an example ROOT file available via anonymous ftp: ftp-glast.slac.stanford.edu cd glast.u05/examples This directory contains 2 files: digi.root and a text file showing the results I get when I attempt to run TTree::BuildIndex. Thanks, Heather
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