snmp error?

/usr/local/nagios/libexec/check_3com_health.pl -H 172.12.X.X

get this:

3COM_HEALTH CRITICAL – FAN:SNMP ERROR PWR:OK MEM:OK CPU:OK | pwr=100%;100;76;0;100 mem=42%;85;90;0;100 cpu=11%;85;90;0;100