Nagios v3 Upgrade Considerations ================================ This applies if you are upgrading from Nagios v2. The Nagios v2 nagios.cfg is will not pass a Nagios v3 syntax check without modification. The attribute "check_result_buffer_slots" from Nagios v2 is incompatible with Nagios v3 and will generate and error. In order to force a Nagios v2 nagios.cfg file to run with Nagios v3 simply commment out the "check_result_buffer_slots" line The included script upgrade_nagios.cfg_to_v3.sh will do this automatically for the file /etc/nagios/nagios.cfg (the standard location for the nagios.cfg file) This is a work-around and you should consider implementing the new nagios.cfg file, which includes several new options. as soon as possible so that you can take advantage of the new features.