java.lang.NullPointerException
   at javax.swing.text.FlowView$LogicalView.getPreferredSpan(FlowView.java:732)
   at javax.swing.text.FlowView.calculateMinorAxisRequirements(FlowView.java:233)
   at javax.swing.text.ParagraphView.calculateMinorAxisRequirements(ParagraphView.java:717)
   at javax.swing.text.html.ParagraphView.calculateMinorAxisRequirements(ParagraphView.java:157)
   at javax.swing.text.BoxView.checkRequests(BoxView.java:935)
   at javax.swing.text.BoxView.getMinimumSpan(BoxView.java:568)
   at javax.swing.text.html.ParagraphView.getMinimumSpan(ParagraphView.java:270)
   at javax.swing.text.BoxView.calculateMinorAxisRequirements(BoxView.java:903)
   at javax.swing.text.html.BlockView.calculateMinorAxisRequirements(BlockView.java:146)
   at javax.swing.text.BoxView.checkRequests(BoxView.java:935)
   at javax.swing.text.BoxView.getMinimumSpan(BoxView.java:568)
   at javax.swing.text.html.BlockView.getMinimumSpan(BlockView.java:378)
   at javax.swing.text.BoxView.calculateMinorAxisRequirements(BoxView.java:903)
   at javax.swing.text.html.BlockView.calculateMinorAxisRequirements(BlockView.java:146)
   at javax.swing.text.BoxView.checkRequests(BoxView.java:935)
   at javax.swing.text.BoxView.setSpanOnAxis(BoxView.java:343)
   at javax.swing.text.BoxView.layout(BoxView.java:708)
   at javax.swing.text.BoxView.setSize(BoxView.java:397)
   at javax.swing.plaf.basic.BasicTextUI$RootView.setSize(BasicTextUI.java:1722)
   at javax.swing.plaf.basic.BasicTextUI.getPreferredSize(BasicTextUI.java:917)
   at javax.swing.JComponent.getPreferredSize(JComponent.java:1659)
   at javax.swing.JEditorPane.getPreferredSize(JEditorPane.java:1332)
   at javax.swing.ScrollPaneLayout.layoutContainer(ScrollPaneLayout.java:791)
   at java.awt.Container.layout(Container.java:1508)
   at java.awt.Container.doLayout(Container.java:1497)
   at java.awt.Container.validateTree(Container.java:1693)
   at java.awt.Container.validateTree(Container.java:1702)
   at java.awt.Container.validateTree(Container.java:1702)
   at java.awt.Container.validateTree(Container.java:1702)
   at java.awt.Container.validateTree(Container.java:1702)
   at java.awt.Container.validateTree(Container.java:1702)
   at java.awt.Container.validateTree(Container.java:1702)
   at java.awt.Container.validateTree(Container.java:1702)
   at java.awt.Container.validate(Container.java:1628)
   at java.awt.Window.dispatchEventImpl(Window.java:2737)
   at java.awt.Component.dispatchEvent(Component.java:4703)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:746)
   at java.awt.EventQueue.access$400(EventQueue.java:97)
   at java.awt.EventQueue$3.run(EventQueue.java:697)
   at java.awt.EventQueue$3.run(EventQueue.java:691)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86)
   at java.awt.EventQueue$4.run(EventQueue.java:719)
   at java.awt.EventQueue$4.run(EventQueue.java:717)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:716)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:109)
   at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:184)
   at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:229)
   at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:227)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:227)
   at java.awt.Dialog.show(Dialog.java:1084)
   at org.netbeans.core.windows.services.NbPresenter.superShow(NbPresenter.java:1065)
   at org.netbeans.core.windows.services.NbPresenter.doShow(NbPresenter.java:1115)
   at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:1087)
   at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:128)
   at org.openide.util.Mutex.doEventAccess(Mutex.java:1376)
   at org.openide.util.Mutex.readAccess(Mutex.java:278)
   at org.netbeans.core.windows.services.NbPresenter.show(NbPresenter.java:1072)
   at java.awt.Component.show(Component.java:1654)
   at java.awt.Component.setVisible(Component.java:1606)
   at java.awt.Window.setVisible(Window.java:1014)
   at java.awt.Dialog.setVisible(Dialog.java:1005)
   at org.openide.explorer.propertysheet.CustomEditorAction.actionPerformed(CustomEditorAction.java:325)
   at org.openide.explorer.propertysheet.SheetTable.editCellAt(SheetTable.java:1135)
   at javax.swing.plaf.basic.BasicTableUI$Handler.adjustSelection(BasicTableUI.java:1108)
   at javax.swing.plaf.basic.BasicTableUI$Handler.mousePressed(BasicTableUI.java:1038)
   at javax.swing.plaf.basic.BasicTableUI$MouseInputHandler.mousePressed(BasicTableUI.java:798)
   at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:280)
   at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:279)
   at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:279)
   at java.awt.Component.processMouseEvent(Component.java:6522)
   at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
   at org.openide.explorer.propertysheet.SheetTable.processMouseEvent(SheetTable.java:833)
   at java.awt.Component.processEvent(Component.java:6290)
   at java.awt.Container.processEvent(Container.java:2234)
   at java.awt.Component.dispatchEventImpl(Component.java:4881)
   at java.awt.Container.dispatchEventImpl(Container.java:2292)
   at java.awt.Component.dispatchEvent(Component.java:4703)
   at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4898)
   at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4530)
   at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4462)
   at java.awt.Container.dispatchEventImpl(Container.java:2278)
   at java.awt.Window.dispatchEventImpl(Window.java:2739)
   at java.awt.Component.dispatchEvent(Component.java:4703)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:746)
   at java.awt.EventQueue.access$400(EventQueue.java:97)
   at java.awt.EventQueue$3.run(EventQueue.java:697)
   at java.awt.EventQueue$3.run(EventQueue.java:691)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86)
   at java.awt.EventQueue$4.run(EventQueue.java:719)
   at java.awt.EventQueue$4.run(EventQueue.java:717)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:716)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)