Usually I can deal with these, but this one is odd...
Our perfectly operating nagios installation simply stopped working -- no changes or upgrades, just quit. It now gives this error:
Error in configuration file '/web/tools/nagios/etc/nagios.cfg' - Line 18 (NULL value)
Although I haven't attached the nagios.cfg file, I can... HOWEVER, what is happening is that it will give that error on the very first directive it hits in the cfg file no matter what it is or where it is. Even creating a test cfg file with only one definition, no comments, etc., it will give the above error on then line 1.
Nagios version 2.0b3 on Linux SLES 9. It's even been completely reinstalled and new configurations built with the same results.
Any clue on what's causing this behavior? we're stumped.