id summary reporter owner description type status component version resolution keywords cc guest host 10753 Taking snapshot of running system produces assertion error EdMcMan "I am running VirtualBox 4.1.18 on a Linux host, with a Linux guest. If I try to take a snapshot from the command line when the VM is running, I get the following assertion errors: {{{ Message from syslogd@localhost at Jul 12 10:58:05 ... kernel:[6742275.026319] Message from syslogd@localhost at Jul 12 10:58:05 ... kernel:[6742275.026320] !!Assertion Failed!! Message from syslogd@localhost at Jul 12 10:58:05 ... kernel:[6742275.026321] Expression: Message from syslogd@localhost at Jul 12 10:58:05 ... kernel:[6742275.026322] Location : /home/vbox/vbox-4.1.18/src/VBox/VMM/VMMAll/PGMAllBth.h(1458) void pgmR0BthAMD64AMD64SyncPageWorkerTrackDeref(VMCPU*, PGMPOOLPAGE*, RTHCPHYS, uint16_t, RTGCPHYS) Message from syslogd@localhost at Jul 12 10:58:05 ... kernel:[6742275.026489] HCPhys=0000000127ae6000 wasn't found! }}} If the VM is not running, I can take the snapshot without a problem. I am running from VBoxHeadless." defect closed VM control VirtualBox 4.1.18 duplicate crash snapshot Linux Linux