Unknown responce on C-Gate

Just looking for some expertise to help with diagnosing a message that I am getting on C-Gate recently. I installed a couple of extra components a bit over a month ago and it was all running stable, then this stated to come up on C-Gate -

<table style="width:auto;"><tr><td><a href="https://picasaweb.google.com/lh/photo/D6DxD_VOhuxTG5JVwtS3IO_9G7Df-iaATESIGxgO87M?feat=embedwebsite"><img src="https://lh5.googleusercontent.com/-...AAAGk/XmYTpJiPz3A/s800/Unknown%20Response.PNG" height="348" width="683" /></a></td></tr><tr><td style="font-family:arial,sans-serif; font-size:11px; text-align:right">From <a href="https://picasaweb.google.com/111362397026260799726/May92014?authuser=0&feat=embedwebsite">May 9, 2014</a></td></tr></table>

To help with diagnosing the problem, I disconnected the new parts (which was a PAC unit and two C-Bus Coupler units) but the message still appears.

Although I am getting this message, the system is still running %100.

Appreciate any help or suggestions.

Edit... Apologies for the thread title dyslexia...

 

Thanks Daniel for the reply. I should know to put that in a post regarding this kind of stuff by now.

Discovered the problem; I have a faulty bus coupler due to a small invasion of ants. I assume it's the fact that ants have high cross talk and poor signal to noise ratio... as well as pissing all over the circuitry might have caused the issue.