Hi, In section 11.2 of the Developer's Handbook (http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/k erneldebug-gdb.html) at the beginning: # cd /usr/obj/usr/src/sys/KERNCONF # kgdb /boot/kernel/kernel.debug /var/crash/vmcore.0 I think it should be: # cd /usr/obj/usr/src/sys/KERNCONF # kgdb kernel.debug /var/crash/vmcore.0 Bye :)