Since you asked about the possibility of the batteries being dead and I have helped a number of people through this recently, thought I'd give my input.
I haven't seen dead batteries in the control cause this fault before, but different boards have different issues when the batteries go dead so I won't say its not possible.
If you are comfortable working with computers, it should be easy enough for you to check the voltages on each board to eliminate this as a possibility.
Are there any other faults that occur, or just this one? Does it happen every time you power up or just occasionally? When it happens does the system halt, or does it continue to load the A2100 software? The more detail you can give me the better chance I have of pointing you in the right direction. When you check the error history on the control does it log these errors?
Regarding local service for your machines, I have a friend that's very familiar with Cincinnati's and visits his daughters out there several times a year, so could hook you up with him if you are interested.
If you are in a rush to get the machine running, I work on these all the time so would be willing to look at it for you. The drawback is I am not local so there would be some travel time involved. PM me if you are interested in either of the above.