Ok, not hero of the day ... Here the lines of interest: Program received signal SIGSEGV, Segmentation fault. 0xb7cd26e1 in ?? () from /lib/i386-linux-gnu/libc.so.6 (gdb) bt #0 0xb7cd26e1 in ?? () from /lib/i386-linux-gnu/libc.so.6 #1 0x085873a3 in std::vector<void*, std::allocator<void*> >::_M_insert_aux(__gnu_cxx::__normal_iterator<void**, std::vector<void*, std::allocator<void*> > >, void* const&) () #2 0x90cfeb48 in std::vector<void*, std::allocator<void*> >::insert(__gnu_cxx::__normal_iterator<void**, std::vector<void*, std::allocator<void*> > >, void* const&) () from /home/xusernamex/X-Plane 9/Aircraft/X-Aviation/CRJ-200/plugins/CRJAvionics/lin.xpl #3 0x90d3d957 in AIRNAV::Navigation::Route::insertWaypoint(AIRNAV::Navigation::Waypoint const&, int, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, bool, bool) () from /home/xusernamex/X-Plane 9/Aircraft/X-Aviation/CRJ-200/plugins/CRJAvionics/lin.xpl #4 0x90ce9355 in AIRNAV::CDU::PageFpln1::RLSK4() () from /home/xusernamex/X-Plane 9/Aircraft/X-Aviation/CRJ-200/plugins/CRJAvionics/lin.xpl #5 0x90ccfa07 in AIRNAV::CDU::PageManager::RLSK4() () from /home/xusernamex/X-Plane 9/Aircraft/X-Aviation/CRJ-200/plugins/CRJAvionics/lin.xpl #6 0x90cd3d36 in openGLCDU<PPL::OverlayGauge>::handleNonDragClick(int, int) () ---Type <return> to continue, or q <return> to quit--- from /home/xusernamex/X-Plane 9/Aircraft/X-Aviation/CRJ-200/plugins/CRJAvionics/lin.xpl #7 0x90d82802 in PPL::OverlayGauge::handle2dClickCallback(void*, int, int, int) () from /home/xusernamex/X-Plane 9/Aircraft/X-Aviation/CRJ-200/plugins/CRJAvionics/lin.xpl #8 0xab0a44d2 in XPLMDisplayMouseClickHook(int, int, int) () from /home/xusernamex/X-Plane 9/Resources/plugins/XPLM.so #9 0xab0aae02 in XPLMMouseClickHook () from /home/xusernamex/X-Plane 9/Resources/plugins/XPLM.so #10 0x0834d836 in XPPMouseClickHook(int, int, int) () #11 0x080badcf in LIN_handleevt(_XEvent*, int) () #12 0x080c6891 in MACIBM_event_proc() () #13 0x080adb05 in main () Real username is replaced by "xusernamex", sorry, typical paranoia of linux-users. Thanks, greetz S. (EDVE)