Nagios Support Forum

I'm getting a (No output returned from plugin) from a host and cannot understand why:

Service on monitor server:

# Check Clamd availability
define service {
hostgroup_name clamd-servers
service_description ClamAV Daemon
check_command check_nrpe!check_clamd
use generic-service
notification_interval 0 ; set > 0 if you want to be renotified
}
Hosts on monitor:

# Clamd Servers
define hostgroup {
hostgroup_name clamd-servers
alias ClamAV servers
members fsmvps
}
nrpe_local.fcfg on host fsmvps

command[check_clamd]=/usr/lib/nagios/plugins/check_clamd -H /var/run/clamav/clamd.ctl
Running the command /usr/lib/nagios/plugins/check_clamd -H /var/run/clamav/clamd.ctl on the host will produce the following output as clam is up and running:

CLAMD OK - 0.000 second response time on socket /var/run/clamav/clamd.ctl [PONG]|time=0.000219s;;;0.000000;10.000000
Clueless at the moment as to why no output is returned as I'm a beginner echatspin echatrandom on Nagios.