<div dir="ltr">Hi I want to simulate a cylindrical PET with trapezoid crystals. I defined the system and attached them. But, when I run my simulation, Segmentation fault (core dumped) error was appeared. The following are some of the threads. Can anyone help me please?===========================================================There was a crash.This is the entire stack trace of all threads:===========================================================...#29 0x00007f9e7429b975 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4#30 0x00007f9e7397e87a in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4#31 0x00007f9e742a2a6c in QLineControl::processKeyEvent(QKeyEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4#32 0x00007f9e7429808a in QLineEdit::keyPressEvent(QKeyEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4#33 0x00007f9e73eeb3e4 in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4#34 0x00007f9e7429d3c1 in QLineEdit::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4#35 0x00007f9e73e9be2c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4#36 0x00007f9e73ea36f1 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4#37 0x00007f9e7396a4dd in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4#38 0x00007f9e73f3b027 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4#39 0x00007f9e73f3b3c9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4#40 0x00007f9e73f15417 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4#41 0x00007f9e73f3db32 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4#42 0x00007f9e6f382e04 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0#43 0x00007f9e6f383048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0#44 0x00007f9e6f3830ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0#45 0x00007f9e739977a1 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4#46 0x00007f9e73f3dbe6 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4#47 0x00007f9e739690af in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4#48 0x00007f9e739693a5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4#49 0x00007f9e7396eb79 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4#50 0x00007f9e7d7ce16d in G4UIQt::SessionStart (this=0x2922b60) at /home/gate/Progs/Geant4/geant4.10.02/source/interfaces/basic/src/G4UIQt.cc:811#51 0x0000000000612075 in main ()=========================================================== <div class="MsoNormal" style="line-height:normal;margin-bottom:10pt">Segmentation fault (core dumped) </div><div class="MsoNormal" style="line-height:normal;margin-bottom:10pt">There were 9 pages thread lines. If you want all threads let me know -- </div><div class="gmail_signature"><div dir="ltr">Merisa Saber</div></div> </div>