An internal error occurred during: "FunctionOverrideProcessor". java.lang.NullPointerException

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I'm getting this error every time Flash Builder 4.7 starts. Sometime the same error pops up sporadicly during the development. Good news that I'm not really affected by it, however, it's bit annoying and indicates about some underlaying problem. I can't get any additional information about this exception nor I can find any relevant documentation. Any helps is appreciated. Thx.