Need help: Cannot run groups

I have a test class with 3 test methods each with a different group.
public class Test1 {
@Test(groups = { "acceptance" })
public void testMethod1() {
}

@Test(groups = {"fuctional"} )
public void testMethod2() {
}

@Test(groups = { "wrapup" })
public void testMethod3() {
}

}


I can run it using class









I can run it using methods including and excluding










It failed with the following error when trying to run groups










FAILED: navigation
java.lang.NullPointerException
at Test1.testMethod3(Test1.java:89)
... Removed 22 stack frames

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GRP-acceptance
Tests run: 1, Failures: 1, Skips: 0

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