I got the same error message.
After the update of JAVA to version 7 update 17 the error message is gone... but nothing else happens. No windows opens, absolutly nothing...
An update to JAVA 8 is not possible, there is a newer windows version required than XP.
Update: Java 7 update 71, the latest version installed. Still no reaction. There is no possibility to start "war chip". Even in the task manager no reaction.
8.12.14 Update: Still not working with XP. But: tried Java 7 update 71 on a Windows 7 pc. The chip is not really recognized, but downloading 2.2.3 at least starts and makes a stop around 90%, but it does not finish.
"MillerWarChip" starts and opens the downloaded 4 files, some Inputs are possible, even the upload to the chip is starting, but does not finish. Surprising, that the System works in some parts on a Windows 7 PC.
=> the problem has something to do with the Java System on the XP PC.