[Nagiosplug-help] Error: Request contained command arguments, but argument option is not enabled!

[Grant Lowe]

 Hi all,

I have a nagios 3.0.3 server running on RHEL 5.2.  The client is Solaris 8 running nrpe 2.10.

I get this in the Solaris logs:

Sep
30 10:36:08 myhost nrpe[7179]: [ID 396531 daemon.error] Error: Request
contained command arguments, but argument option is not enabled!
Sep 30 10:36:08 myhost nrpe[7179]: [ID 900267 daemon.error] Client request was invalid, bailing out...

But if I run it locally, it comes back fine:

myserver /tmp>  /opt/csw/libexec/nagios-plugins/check_disk -w 90 -c 95 /dev/dsk/c0t0d0s0
DISK OK - free space: / 1023 MB (52% inode=83%);| /=923MB;1917;1912;0;2007
myserver /tmp>

Here's what I get from the server side:

[root at nagios-test
libexec]# /usr/lib/nagios/plugins/check_nrpe -H 172.20.60.50 -t 60 -n
check_disk -a -w 90 -c 95 /dev/dsk/c0t0d0s0
CHECK_NRPE: Received 0 bytes from daemon.  Check the remote server logs for error messages.
[root at nagios-test libexec]#

It's
seems to me that it's a configuration error, but I'm not sure what to
fix.  Please help and don't be too hard on me as I'm kind of new to
this.  :-)