java.lang.NullPointerException
   at org.netbeans.modules.xml.wizard.XMLGeneratorVisitor.generateXML(XMLGeneratorVisitor.java:136)
   at org.netbeans.modules.xml.wizard.XMLGeneratorVisitor.generateXML(XMLGeneratorVisitor.java:166)
   at org.netbeans.modules.xml.wizard.impl.XMLWizardIterator.generateXMLBody(XMLWizardIterator.java:500)
   at org.netbeans.modules.xml.wizard.impl.XMLWizardIterator.prepareParameters(XMLWizardIterator.java:731)
   at org.netbeans.modules.xml.wizard.impl.XMLWizardIterator.instantiate(XMLWizardIterator.java:231)
   at org.openide.loaders.TemplateWizard.handleInstantiate(TemplateWizard.java:605)
   at org.openide.loaders.TemplateWizard.instantiateNewObjects(TemplateWizard.java:439)
   at org.openide.loaders.TemplateWizardIterImpl.instantiate(TemplateWizardIterImpl.java:248)
   at org.openide.loaders.TemplateWizardIteratorWrapper.instantiate(TemplateWizardIteratorWrapper.java:160)
   at org.openide.WizardDescriptor.callInstantiateOpen(WizardDescriptor.java:1629)
   at org.openide.WizardDescriptor.callInstantiate(WizardDescriptor.java:1570)
   at org.openide.WizardDescriptor.access$2300(WizardDescriptor.java:92)
   at org.openide.WizardDescriptor$Listener$2$1.run(WizardDescriptor.java:2257)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1425)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2038)