java.lang.ClassCastException: net.sf.saxon.tinytree.TinyElementImpl cannot be cast to org.w3c.dom.Node
        at org.netbeans.modules.uml.drawingarea.support.DiagramTypesManager.getStringAttributeValue(DiagramTypesManager.java:248)
        at org.netbeans.modules.uml.drawingarea.support.DiagramTypesManager.getDiagramTypeName(DiagramTypesManager.java:218)
        at org.netbeans.modules.uml.drawingarea.support.DiagramTypesManager.getUMLType(DiagramTypesManager.java:380)
        at org.netbeans.modules.uml.drawingarea.UMLDiagramTopComponent.initNewDiagram(UMLDiagramTopComponent.java:788)
        at org.netbeans.modules.uml.drawingarea.UMLDiagramTopComponent.<init>(UMLDiagramTopComponent.java:305)
        at org.netbeans.modules.uml.drawingarea.UMLDiagramManager.doCreateDiagram(UMLDiagramManager.java:765)
        at org.netbeans.modules.uml.drawingarea.UMLDiagramManager.createDiagram(UMLDiagramManager.java:287)
        at org.netbeans.modules.uml.drawingarea.UMLDiagramManager.doNewDiagramDialog(UMLDiagramManager.java:737)
        at org.netbeans.modules.uml.drawingarea.UMLDiagramManager.newDiagramDialog(UMLDiagramManager.java:212)
        at org.netbeans.modules.uml.drawingarea.ui.addins.diagramcreator.DiagCreatorAddIn.guiCreateDiagram(DiagCreatorAddIn.java:783)
        at org.netbeans.modules.uml.drawingarea.ui.addins.diagramcreator.DiagCreatorAddIn.guiCreateDiagramFromElements(DiagCreatorAddIn.java:243)
        at org.netbeans.modules.uml.drawingarea.actions.CreateDiagramFromSelectedElementsAction.performAction(CreateDiagramFromSelectedElementsAction.java:87)
        at org.openide.util.actions.NodeAction$DelegateAction$1.run(NodeAction.java:589)
        at org.netbeans.modules.openide.util.ActionsBridge.doPerformAction(ActionsBridge.java:77)
        at org.openide.util.actions.NodeAction$DelegateAction.actionPerformed(NodeAction.java:585)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2012)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2335)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:404)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
        at javax.swing.AbstractButton.doClick(AbstractButton.java:374)
        at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1688)
        at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1732)
        at java.awt.Component.processMouseEvent(Component.java:6108)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3276)
        at java.awt.Component.processEvent(Component.java:5873)
        at java.awt.Container.processEvent(Container.java:2105)
        at java.awt.Component.dispatchEventImpl(Component.java:4469)
        at java.awt.Container.dispatchEventImpl(Container.java:2163)
        at java.awt.Component.dispatchEvent(Component.java:4295)
        at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4461)
        at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4125)
        at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4055)
        at java.awt.Container.dispatchEventImpl(Container.java:2149)
        at java.awt.Window.dispatchEventImpl(Window.java:2478)
        at java.awt.Component.dispatchEvent(Component.java:4295)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:604)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:275)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:200)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:185)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:177)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:138)