Hi all, I apologize if this is an old problem. I tried searching the archives and found some similar cases, but nothing with clear resolution. I'm trying to check for the presence of a particular process on a remove machine using NRPE and check_procs with a -a or -C argument. I have defined on the remote machine's nrpe_local.cfg: command[check_foo]=/usr/nagios/plugins/check_procs -c 1:1 -C foo Running a similar command locally on that machine works fine: $ /usr/lib/nagios/plugins/check_procs -c 1:1 -C foo PROCS OK: 1 process with command name 'foo' But when I try to run the command from the Nagios server, I get the following result: $ /usr/lib/nagios/plugins/check_nrpe -H remote.host -c check_foo NRPE: Unable to read output Whereas other monitored services work fine: $ /usr/lib/nagios/plugins/check_nrpe -H remote.host -c check_procs PROCS OK: 97 processes Similar behavior occurs whether I use the -a or -C option with the check_procs plugin. Both the server and remote host are Debian Lenny amd64, NRPE is v2.8.1, nagios-plugins is 1.4.12-5, Nagios is 3.0.6-4 (all from stable Lenny repositories, installed with apt) Can anyone point out what I'm doing wrong? Thanks! -Arthur <div style="visibility: hidden; display: inline;" id="avg_ls_inline_popup"></div><style type="text/css">#avg_ls_inline_popup { position:absolute; z-index:9999; padding: 0px 0px; margin-left: 0px; margin-top: 0px; width: 240px; overflow: hidden; word-wrap: break-word; color: black; font-size: 10px; text-align: left; line-height: 13px;}</style>