javax.swing.text.BadLocationException: Modification not allowed
   at org.openide.text.CloneableEditorSupport$DocFilter.modificationNotAllowed(CloneableEditorSupport.java:2411)
   at org.openide.text.CloneableEditorSupport$DocFilter.checkModificationAllowed(CloneableEditorSupport.java:2405)
   at org.openide.text.CloneableEditorSupport$DocFilter.remove(CloneableEditorSupport.java:2361)
   at org.netbeans.editor.BaseDocument.remove(BaseDocument.java:937)
Caused: java.io.IOException
   at org.netbeans.modules.cnd.refactoring.support.ModificationResult$1.run(ModificationResult.java:147)
   at org.netbeans.editor.GuardedDocument.runAtomic(GuardedDocument.java:321)
   at org.netbeans.modules.cnd.refactoring.support.ModificationResult.commit(ModificationResult.java:156)
   at org.netbeans.modules.cnd.refactoring.support.ModificationResult.commit(ModificationResult.java:104)
Caused: java.lang.RuntimeException: java.io.IOException
   at org.netbeans.modules.refactoring.spi.RefactoringCommit.commit(RefactoringCommit.java:165)
   at org.netbeans.modules.refactoring.api.RefactoringSession.reallyDoRefactoring(RefactoringSession.java:166)
   at org.netbeans.modules.refactoring.api.RefactoringSession.access$100(RefactoringSession.java:79)
   at org.netbeans.modules.refactoring.api.RefactoringSession$1.run(RefactoringSession.java:122)
   at org.netbeans.modules.refactoring.api.RefactoringSession$1.run(RefactoringSession.java:120)
   at org.netbeans.modules.editor.lib.BeforeSaveTasks.runWithOnSaveTasksDisabled(BeforeSaveTasks.java:93)
   at org.netbeans.editor.Utilities.runWithOnSaveTasksDisabled(Utilities.java:1624)
   at org.netbeans.modules.refactoring.api.RefactoringSession.doRefactoring(RefactoringSession.java:120)
   at org.netbeans.modules.refactoring.spi.impl.RefactoringPanel$2.run(RefactoringPanel.java:556)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)