[Nagiosplug-help] Return code of 127 for check of service...

[pravin kale]

I am new to nagios ..
 
I installed nagios on a red hat 8.0. I also installed (I hope so..)
plugins for the same ( nagios-plugins-1.3.0).
 
But when I am browsing the, it's giving me the following error:
 
Warning: Return code of 127 for check of service 'POP3' on host
'testhost' was out of bounds. Make sure the plugin you're trying to run
actually exists.
 
I am sure I must be doing something wrong
Please guide me about the same
Thanks & regards
Pravin

 
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