<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html;charset=ISO-8859-1"> <title></title> </head> <body text="#000000" bgcolor="#ffffff"> <div class="moz-text-html" lang="x-western"> Hello Gaters, I have been attempting to solve this problem on my own with no success.  I had initially posted this problem thinking it was related to the way i initialize my random number.  But after attempting a run as i had done numerous times earlier I found that i still had the crash.  Has anyone seen such a core dump, or does anyone know what might be wrong.  I cant seem to understand what might be wrong simply by looking at the dump.  I am attaching my macro along with this posting in case that help shed some extra insight.  Any suggestions would be greatly appreciated. Thanks, Ananth Below is a sample of the dump that I recieve:. [digitizer/Singles/spblurring::ProcessPulseList]: processing input list with 1 e ntries [digitizer/Singles/spblurring::ProcessPulseList]: returning output pulse-list wi th 1 entries         ----GatePulse----                 Run           0                 Event         206599                 Src           0 [ -4.98215 5.04027 6.03481 mm ]                 Time          350.071 mus                 Energy        21.8151 keV                 localPos      [ -0.0677752 9.90138 9.52104 mm ]                 globalPos     [ 7.11117 14.2026 0.952104 cm ]                            -> ( R=15.8834 cm , phi=63.403 deg,z=9.52104 mm )                 VolumeID      Vol(0 -> world-0/world_P-0 -> SPECThead-2/SPECThea d_P-2 -> crystal-0/crystal_P-1)                 OutputID      2 0 0                 #Compton      0                 #Rayleigh     0                 scannerPos    [ 14.15 0 0 cm ]                 scannerRotAngle 0 deg         -----------------        *** Break *** segmentation violation  Generating stack trace...  0x0819fb43 in GateAnalysis::RecordEndOfEvent(G4Event const*) + 0xc35 from ./Gat e  0x08173f42 in GateOutputMgr::RecordEndOfEvent(G4Event const*) + 0x86 from ./Gat e  0x0816d1e2 in GateEventAction::EndOfEventAction(G4Event const*) + 0x140 from ./ Gate  0x083744de in G4EventManager::ProcessOneEvent(G4Event*) + 0x764 from ./Gate  0x083609e1 in G4RunManager::DoEventLoop(int, char const*, int) + 0xf9 from ./Ga te  0x08360307 in G4RunManager::BeamOn(int, char const*, int) + 0x3b from ./Gate  0x0816071f in GateApplicationMgr::StartDAQ() + 0x1a7 from ./Gate  0x081a2bae in GateApplicationMgrMessenger::SetNewValue(G4UIcommand*, G4String) + 0x110 from ./Gate  0x08755f32 in G4UIcommand::DoIt(G4String) + 0x1774 from ./Gate  0x087640ea in G4UImanager::ApplyCommand(char const*) + 0xb34 from ./Gate  0x087635b4 in G4UImanager::ApplyCommand(G4String) + 0x22 from ./Gate  0x08350086 in G4UIterminal::ExecuteCommand(G4String) + 0x42 from ./Gate  0x0834fc19 in G4UIterminal::SessionStart() + 0x4d from ./Gate  0x0815ed44 in main + 0x6a6 from ./Gate  0xb611979d in __libc_start_main + 0xed from /lib/tls/libc.so.6  0x0815df49 in TFile::TFile(char const*, char const*, char const*, int) + 0x41 f rom ./Gate Aborted </div> </body> </html>