Unable to read from byte cache

I'm working my way through the GWT tutorial and have reached the JUnit chapter.

I downloaded the sample StockWatcher application and imported it into Eclipse Indigo. I updated the appropriate control files according to the tutorial.

When I try to launch the app I get the following message: "Unable to read from byte cache." I haven't been able to find a reference to this from any Internet searches.

Can someone give me a lead as to what this means and how to I fix it?

Thanks.

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