Dear All, I have a strange problem with Nagios V1.1 using the plugins from v1.3.1. I have a remote router which ordinarily is checked by 'check_http' every x minutes. In some cases the check fails (ADSL) so Nagios will then run the host check command 'check_tcp'. However in some cases this fails and just leaves the error message 'check_tcp: unknown argument (null). The majority of the time though this check runs just fine. My questions is therefore, what am I doing wrong ? I have been running Nagios for some time (great stuff Ethan) and this has only cropped up in the last few months. If anybody has seen this, or can help I would appreciate it greatly. Many thanks Matthew