Yes, this is a notoriously horrible error message (personally). You'll not see it again for several months, and when you do, you'll forget what it means and come back here again, only to go "DOH! I remember!" and be on your merry way.
But it's a technically accurate while being practically worthless error message frankly.
[Message sent by forum member 'whartung' (whartung)]
http://forums.java.net/jive/thread.jspa?messageID=239833