java.lang.NullPointerException
   at org.netbeans.modules.schema2beans.XMLUtil.reindent(XMLUtil.java:530)
   at org.netbeans.modules.schema2beans.XMLUtil.reindent(XMLUtil.java:536)
   at org.netbeans.modules.schema2beans.XMLUtil.reindent(XMLUtil.java:536)
   at org.netbeans.modules.schema2beans.XMLUtil.reindent(XMLUtil.java:516)
   at org.netbeans.modules.schema2beans.GraphManager.reindent(GraphManager.java:316)
   at org.netbeans.modules.schema2beans.BaseBean.reindent(BaseBean.java:1134)
   at org.netbeans.modules.j2ee.dd.impl.web.WebAppProxy.write(WebAppProxy.java:935)
   at org.netbeans.modules.j2ee.ddloaders.multiview.DDMultiViewDataObject.generateDocumentFromModel(DDMultiViewDataObject.java:174)
   at org.netbeans.modules.j2ee.ddloaders.multiview.DDMultiViewDataObject$ModelSynchronizer.updateDataFromModel(DDMultiViewDataObject.java:265)
   at org.netbeans.modules.xml.multiview.XmlMultiViewDataSynchronizer.updateData(XmlMultiViewDataSynchronizer.java:264)
   at org.netbeans.modules.j2ee.ddloaders.multiview.DDMultiViewDataObject$ModelSynchronizer.updateData(DDMultiViewDataObject.java:256)
   at org.netbeans.modules.j2ee.ddloaders.multiview.DDMultiViewDataObject.writeModel(DDMultiViewDataObject.java:139)
   at org.netbeans.modules.j2ee.ddloaders.multiview.DDMultiViewDataObject.writeModel(DDMultiViewDataObject.java:128)
   at org.netbeans.modules.j2ee.dd.impl.web.WebAppProxy.write(WebAppProxy.java:944)
   at org.netbeans.modules.web.refactoring.WebXmlRefactoring$WebRefactoringElement.writeDD(WebXmlRefactoring.java:176)
   at org.netbeans.modules.web.refactoring.WebXmlRefactoring$WebRefactoringElement.performChange(WebXmlRefactoring.java:171)
   at org.netbeans.modules.refactoring.api.RefactoringSession.reallyDoRefactoring(RefactoringSession.java:145)
   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:1625)
   at org.netbeans.modules.refactoring.api.RefactoringSession.doRefactoring(RefactoringSession.java:120)
   at org.netbeans.modules.refactoring.spi.impl.ParametersPanel$9.run(ParametersPanel.java:480)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)