[Mark McLeod]

Sorry to take so long Andy.

I was successfully(?) able to recreate your connect problem.
(Although there may be other ways to cause the issue...)

I want you to try this specific sequence of steps:
1) Start Wind River
2) Try to connect (and get the error message)
3) Leave Wind River running
4) Start the FRC cRIO Imaging Tool
5) Choose the Development Environment Wind River and Apply (don't reformat the controller)
6) Return to Wind River and try to connect again

I got the same message you did when I had my environment set to LabVIEW, and was able to switch development environments to get Wind River working. However, it can go back to having trouble connecting when Wind River is stopped altogether and restarted (not always though). Wind River can then disconnect and connect repeatedly without trouble as long as it isn't exited. Switching the development environments while Wind River is running seems to work, but I'll try to ferret out the underlying issue if this turns out to be the same problem you're having.

I'll look for other ways to cause a failure to connect...