Was just beginning a drawpatch9 tut.
It's been a few months since I have done anything with the SDK except update it.
I went to start drawpatch9.bat and got this error.
It disappears really fast so I hit control+(i have no clue) and got it to freeze up for a screenie!
Sorry, I prematurely posted. Problem was solved by downloading swing-worker-1.1.jar and moving it to the SDK\tools\lib directory