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    Take a look at this blog post on how to set up Grid2 A user related (in the email group on the source) that using older selenium libs solves this exception.

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This exception has no message.
java.lang.NullPointerException: 	at	at	at	at	at BrowserConfig.crossBrowserConfiguration.(	at TestCases.initiateBrows.(	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)	at sun.reflect.NativeConstructorAccessorImpl.newInstance(	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(	at java.lang.reflect.Constructor.newInstance(	at org.junit.runners.BlockJUnit4ClassRunner.createTest(	at org.junit.runners.BlockJUnit4ClassRunner$1.runReflectiveCall(	at	at org.junit.runners.BlockJUnit4ClassRunner.methodBlock(	at org.junit.runners.BlockJUnit4ClassRunner.runChild(	at org.junit.runners.BlockJUnit4ClassRunner.runChild(	at org.junit.runners.ParentRunner$	at org.junit.runners.ParentRunner$1.schedule(	at org.junit.runners.ParentRunner.runChildren(	at org.junit.runners.ParentRunner.access$000(	at org.junit.runners.ParentRunner$2.evaluate(	at	at	at	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(	at	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(	at BrowserConfig.crossBrowserConfiguration.(