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non-invertible transform error

I am preparing for a new VisBio release, and when testing the "Java2D only"
display mode, I received the following error.  I tested a Java2D example and
it worked fine, so I must be doing something different in my code somewhere.

Any thoughts?

Thanks,
-Curtis

----
Exception occurred during event dispatching:
visad.VisADError: MouseBehaviorJ2D.findRay: non-invertable transform
        at visad.java2d.MouseBehaviorJ2D.findRay(MouseBehaviorJ2D.java:112)
        at visad.MouseHelper.processEvent(MouseHelper.java:160)
        at visad.MouseHelper.processEvent(MouseHelper.java:138)
        at visad.java2d.VisADCanvasJ2D$2.mousePressed(VisADCanvasJ2D.java:237)
        at java.awt.Component.processMouseEvent(Component.java:3707)
        at java.awt.Component.processEvent(Component.java:3539)
        at java.awt.Container.processEvent(Container.java:1159)
        at java.awt.Component.dispatchEventImpl(Component.java:2588)
        at java.awt.Container.dispatchEventImpl(Container.java:1208)
        at java.awt.Component.dispatchEvent(Component.java:2492)
        at 
java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:2451)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:2210)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:2125)
        at java.awt.Container.dispatchEventImpl(Container.java:1195)
        at java.awt.Window.dispatchEventImpl(Window.java:923)
        at java.awt.Component.dispatchEvent(Component.java:2492)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:334)
        at 
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:126)
        at 
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:93)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:88)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:80)


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