I have a problem with my nagios configuration, and I am unsure of what the cause is. I am a nagios n00b, so you will have to go easy on me! :-) Currently, I am seeing errors related to serviceescalation & hostescalations definitions, and they seem to give the identical error, Unknown contact. WARNING: Unknown contact keyword: serviceescalation I have looked at the nagios documentation, and verified that the serviceescalation definition has all of the required fields. In the serviceescalations that are defined, I have the following fields defined: - hostgroup_name - service_description - first_notification - last_notification - notification_interval - contact_groups All of the required fields are present, and I read in the documentation that you can define either host_name or hostgroup_name and contacts or contact_groups, and so this looks OK to me. I also tried to do a verification of the syntax of the nagios configuration by running a nagios -v config_filename And this output produced zero errors on the configuration. Another thought I had: Since it says unknown contact, I drilled down into the contacts. I see that the hostgroup_name is defined only with a hostgroup_name and alias set. According to the documentation, this is also valid syntax. I went and looked back at the host definition, and it does associate hosts with hostgroups that have been defined. So, the hosts have been associated with the hostgroups, and the serviceescalations (& the hostescalations for that matter) have been associated with the escalations. Does anybody have any other ideas what I should be looking for in tracking down the reason for this warning message? ~Chad