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Dear Cejo George, It could be that you have defined a volume in your geometry incorrectly (e.g. created a physical volume with no logical volume). If you are unable to find the issue quickly by inspecting the code of the detector construction, I suggest to: - run with /tracking/verbose 1 to see in which volume the error occurs (put the output into a file - or pipe it into 'tail' to keep only the last lines) - recompile Geant4 with debug information, and identify the line of G4Transportation in which it is failing. Can you please give more information about what program you are running, and the type and complexity of the geometry which you have described to Geant4. Best regards, John =================================================== John Apostolakis, SFT (SoFTware) Group, PH Department, CERN On Feb 6, 2013, at 10:32 AM, Cejo George wrote: > > *** Discussion title: Geometry > > Dear all, > I'm facing a problem while running my program. I receive segmentation fault > if i run it for /run/beamOn more than 10,000. This occurs only for > program producing Optical photons with Cs -137 ion used as source. Using gdb i get > message as shown below > segmentation fault(core dumped) > using gdb- > Program received signal SIGSEGV, Segmentation fault. > 0x00ae7524 in G4Transportation::PostStepDoIt(G4Track const&, G4Step const&) () > from /home/cejo/project/geant4.9.4.p03/lib/Linux-g++/libG4processes.so > But i'm unable to correct the error. Looking forward for some help. > > With Thanks and Regards, Cejo George > > ------------------------------------------------------------- > Visit this GEANT4 at hypernews.slac.stanford.edu message (to reply or unsubscribe) at: > http://hypernews.slac.stanford.edu/HyperNews/geant4/get/geometry/1256.html