sayan@sayan-HP-Pavilion-Notebook:~/Tools/Fastjet$ ./Example26 zfinal.root output7.dat 
Total number of events in file :10000
Events to be analyzed : 10000
At event 0
#--------------------------------------------------------------------------
#                         FastJet release 3.2.1
#                 M. Cacciari, G.P. Salam and G. Soyez                  
#     A software package for jet finding and analysis at colliders      
#                           http://fastjet.fr                           
#	                                                                      
# Please cite EPJC72(2012)1896 [arXiv:1111.6097] if you use this package
# for scientific work and optionally PLB641(2006)57 [hep-ph/0512210].   
#                                                                       
# FastJet is provided without warranty under the terms of the GNU GPLv2.
# It uses T. Chan's closest pair algorithm, S. Fortune's Voronoi code
# and 3rd party plugin jet algorithms. See COPYING file for details.
#--------------------------------------------------------------------------
At event 1000
At event 2000
At event 3000
At event 4000
At event 5000
At event 6000
At event 7000

 *** Break *** segmentation violation



===========================================================
There was a crash.
This is the entire stack trace of all threads:
===========================================================
#0  0x00007f2522a84687 in __GI___waitpid (pid=5088, stat_loc=stat_loc
entry=0x7ffc111acc68, options=options
entry=0) at ../sysdeps/unix/sysv/linux/waitpid.c:30
#1  0x00007f25229ef067 in do_system (line=<optimized out>) at ../sysdeps/posix/system.c:149
#2  0x00007f25245092f7 in TUnixSystem::Exec (shellcmd=<optimized out>, this=0x559a36e987c0) at /home/sayan/Downloads/root-6.12.06/core/unix/src/TUnixSystem.cxx:2118
#3  TUnixSystem::StackTrace (this=0x559a36e987c0) at /home/sayan/Downloads/root-6.12.06/core/unix/src/TUnixSystem.cxx:2412
#4  0x00007f252450ba1c in TUnixSystem::DispatchSignals (this=0x559a36e987c0, sig=kSigSegmentationViolation) at /home/sayan/Downloads/root-6.12.06/core/unix/src/TUnixSystem.cxx:3643
#5  <signal handler called>
#6  0x0000559a36baf712 in main ()
===========================================================


The lines below might hint at the cause of the crash.
You may get help by asking at the ROOT forum http://root.cern.ch/forum.
Only if you are really convinced it is a bug in ROOT then please submit a
report at http://root.cern.ch/bugs. Please post the ENTIRE stack trace
from above as an attachment in addition to anything else
that might help us fixing this issue.
===========================================================
#6  0x0000559a36baf712 in main ()
===========================================================