All,<br><br>For my work, I would like to be able to simulate positrons
emitted from a point source in air. To do so, I am enclosing the source
in a 1 mm radius sphere of water for attenuation and annihilation. I
recognize that doing so likely means some positrons will escape the
world volume without annihilating. <br><br>However, sometimes (not all the time), my simulations of
point sources at different locations return a segmentation violation
and a core dump. Often, I am able to rerun the same simulation with a
different seed without problems. The error message is below, slightly
abbreviated to reduce the size of my log files (if it might help to
have a more detailed output, I am happy to change my settings and
provide this):
<br><br>.<br>.<br>.<br>.<br>[GateTrajectoryNavigator:<div id="mb_0">:FindAnnihilationGammasTrackID] WARNING : positron found and photonID vector size: 1<br>[GateTrajectoryNavigator::FindAnnihilationGammasTrackID] WARNING : positron found and photonID vector size: 1
<br>[GateTrajectoryNavigator::FindAnnihilationGammasTrackID] WARNING : positron found and photonID vector size: 1<br>[GateTrajectoryNavigator::FindAnnihilationGammasTrackID] WARNING : positron found and photonID vector size: 1
<br>[GateTrajectoryNavigator::FindAnnihilationGammasTrackID] WARNING : positron found and photonID vector size: 1<br>[GateTrajectoryNavigator::FindAnnihilationGammasTrackID] WARNING : positron found and photonID vector size: 1
<br>[GateTrajectoryNavigator::FindAnnihilationGammasTrackID] WARNING : positron found and photonID vector size: 1<br>[GateTrajectoryNavigator::FindAnnihilationGammasTrackID] WARNING : positron found and photonID vector size: 4
<br><br> *** Break *** segmentation violation<br> Generating stack trace...<br>/usr/bin/addr2line: 'gate': No such file<br>/usr/bin/addr2line: 'gate': No such file<br>/usr/bin/addr2line: 'gate': No such file
<br>/usr/bin/addr2line: 'gate': No such file<br>/usr/bin/addr2line: 'gate': No such file<br>/usr/bin/addr2line: 'gate': No such file<br>/usr/bin/addr2line: 'gate': No such file<br>/usr/bin/addr2line: 'gate': No such file
<br>/usr/bin/addr2line: 'gate': No such file<br>/usr/bin/addr2line: 'gate': No such file<br>/usr/bin/addr2line: 'gate': No such file<br>/usr/bin/addr2line: 'gate': No such file<br>/usr/bin/addr2line: 'gate': No such file
<br>/usr/bin/addr2line: 'gate': No such file<br>/usr/bin/addr2line: 'gate': No such file<br>/usr/bin/addr2line: 'gate': No such file<br>/usr/bin/addr2line: 'gate': No such file<br>/usr/bin/addr2line: 'gate': No such file
<br> 0x0000000000570630 in GateDigitizer::Digitize() + 0x1f0 from gate<br> 0x000000000057fa6e in GateOutputMgr::RecordEndOfEvent(G4Event const*) + 0x8e from gate<br> 0x0000000000575f7f in GateEventAction::EndOfEventAction(G4Event const*) + 0x8f from gate
<br> 0x0000000000a4c30a in G4EventManager::DoProcessing(G4Event*) + 0x6da from gate<br> 0x000000000099e7e1 in G4RunManager::DoEventLoop(int, char const*, int) + 0xd1 from gate<br> 0x000000000099d0c1 in G4RunManager::BeamOn(int, char const*, int) + 0x91 from gate
<br> 0x0000000000567edb in GateApplicationMgr::StartDAQ() + 0x11b from gate<br> 0x00000000005b884b in GateApplicationMgrMessenger::SetNewValue(G4UIcommand*, G4String) + 0x12b from gate<br> 0x0000000000bd3f18 in G4UIcommand::DoIt(G4String) + 0x388 from gate
<br> 0x0000000000bdd772 in G4UImanager::ApplyCommand(char const*) + 0x482 from gate<br> 0x0000000000be560d in G4UIbatch::SessionStart() + 0x3fd from gate<br> 0x0000000000bda705 in G4UImanager::ExecuteMacroFile(char const*) + 0x45 from gate
<br> 0x00000000005a5cb0 in GateUIcontrolMessenger::LaunchMacroFile(G4String) + 0xb0 from gate<br> 0x00000000005a5e27 in GateUIcontrolMessenger::SetNewValue(G4UIcommand*, G4String) + 0xd7 from gate<br> 0x0000000000bd3f18 in G4UIcommand::DoIt(G4String) + 0x388 from gate
<br> 0x0000000000bdd772 in G4UImanager::ApplyCommand(char const*) + 0x482 from gate<br> 0x0000000000566671 in main + 0x751 from gate<br> 0x000000381d01c784 in __libc_start_main + 0xf4 from /lib64/libc.so.6<br> 0x00000000005653aa in TApplicationImp::ShowMembers(TMemberInspector&, char*) + 0x9a from gate
<br>dogaterun.positrons: line 3: 29484 Aborted (core dumped) gate main.ps.positrons.x0y0.mac<br><br>thanks again,<br clear="all"></div><br clear="all"><br>-- <br>***************************************************************************
<br>Jonathan Engle, Lab Tech<br>Utah Center for Advanced Imaging Research<br>729 Arapeen Drive, Salt Lake City, UT 84108-1218<br>(801) 581.8288, <a href="http://englephysics.com">englephysics.com</a><br>***************************************************************************