java.lang.IllegalStateException: Cannot call getCompilationUnit() if current phase < JavaSource.Phase.PARSED. You must call toPhase(Phase.PARSED) first.
   at org.netbeans.modules.java.source.parsing.CompilationInfoImpl.getCompilationUnit(CompilationInfoImpl.java:212)
   at org.netbeans.api.java.source.CompilationInfo.getCompilationUnit(CompilationInfo.java:186)
   at org.netbeans.api.java.source.TreeUtilities.pathFor(TreeUtilities.java:260)
   at org.netbeans.api.java.source.TreePathHandle$TreeDelegate.resolvePathForPos(TreePathHandle.java:482)
   at org.netbeans.api.java.source.TreePathHandle$TreeDelegate.resolve(TreePathHandle.java:475)
   at org.netbeans.api.java.source.TreePathHandle$TreeDelegate.resolveElement(TreePathHandle.java:542)
   at org.netbeans.api.java.source.TreePathHandle.resolveElement(TreePathHandle.java:188)
   at org.netbeans.modules.refactoring.java.plugins.JavaWhereUsedQueryPlugin.preCheck(JavaWhereUsedQueryPlugin.java:122)
   at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin$WorkingTask.run(JavaRefactoringPlugin.java:353)
   at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin$WorkingTask.run(JavaRefactoringPlugin.java:329)
   at org.netbeans.api.java.source.JavaSource$MultiTask.run(JavaSource.java:493)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:593)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:155)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:139)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:206)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:203)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:74)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:203)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:106)
   at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:443)
   at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:414)
   at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin$WorkingTask.run(JavaRefactoringPlugin.java:342)
   at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin$WorkingTask.access$100(JavaRefactoringPlugin.java:329)
   at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.preCheck(JavaRefactoringPlugin.java:136)
   at org.netbeans.modules.refactoring.java.plugins.JavaWhereUsedQueryPlugin.preCheck(JavaWhereUsedQueryPlugin.java:116)
   at org.netbeans.modules.refactoring.api.AbstractRefactoring.pluginsPreCheck(AbstractRefactoring.java:382)
   at org.netbeans.modules.refactoring.api.AbstractRefactoring.preCheck(AbstractRefactoring.java:205)
   at org.netbeans.modules.refactoring.spi.impl.ParametersPanel$11.run(ParametersPanel.java:620)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)