I highly recommend posting over here http://www.controlbooth.com/forums/s...usic-intercom/
it's a site specifically for Theater / Event Techs / Crew & Installers. As mentioned DBX support is great so you can always give them a call and have it resolved in no time (assuming it's not an issue that needs some type of replacement or part repaired.
Do you have a way to check the programming of the unit? These devices are used for routing multiple audio sources to different "zones / areas" and have a program that runs on them that allows different DSP effects to be added (EQ, Auto Warmth, Fading), routing of zones, control panels, etc.. I'm not sure what that error means specifically but you could always take a look at the program running on the unit.
To update or reflash the unit you need the ZonePro Gui Interface - ftp://ftp.dbxpro.com/pub/software/Zo....2%20Setup.exe