HELP!! Nagios service won't start on live system!

[lce411]

I was trying to integrate a MySQL server into our current Nagios setup. I was following some step-by-step directions provided to me by someone working on the same project, but in a different city. Something I have done has caused a serious problem and is not allowing the nagios service to start. I ran "/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg" and it finished with zero errors or warnings, but when I tried to start the service I get "Starting nagios:CONFIG ERROR! Start aborted. Check your Nagios configuration." I have checked and re-checked the nagios.cfg file but haven't seen anything that would cause the error. Does anyone have any suggestions on what may be allowing the first command to complete with no error, but would still not allow the service to start?

[lmiltchev]

Check if SELinux is enabled:

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sestatus

Post the "nagios.cfg" file so we can take a look at it.