Invalid config command
This error occurs when either an invalid configuration command is part of rsyslog.con or when the command is valid, but resides in a not-yet-loaded plugin.
To use commands provided by plugins, the plugin must be loaded first (via $ModLoad). Only after that the command can be used.
This error may also be caused by a module load failure. Be sure to check error messages before this one, they may point you into the right direction. Please note that this message should be followed by another one which tells you on which line of rsyslog.conf the problem occurred.
2008-06-27T12:29:44.828434+02:00 machine.example.net rsyslogd-3003:invalid or yet-unknown config file command – have you forgotten to load a module? [try http://www.rsyslog.com/e/3003 ]