java.lang.NullPointerException at org.netbeans.modules.form.binding.BindingDesignSupportImpl.getBindingDescriptors(BindingDesignSupportImpl.java:380) at org.netbeans.modules.form.BindingCustomizer$ExpressionNode.(BindingCustomizer.java:1324) at org.netbeans.modules.form.BindingCustomizer$ExpressionNode.loadChildren(BindingCustomizer.java:1389) at org.netbeans.modules.form.BindingCustomizer$ExpressionNode.loadChildren(BindingCustomizer.java:1373) at javax.swing.JTree$DynamicUtilTreeNode.getChildCount(JTree.java:3982) at javax.swing.tree.DefaultTreeModel.getChildCount(DefaultTreeModel.java:186) at javax.swing.tree.VariableHeightLayoutCache$TreeStateNode.expand(VariableHeightLayoutCache.java:1479) at javax.swing.tree.VariableHeightLayoutCache$TreeStateNode.expand(VariableHeightLayoutCache.java:1288) at javax.swing.tree.VariableHeightLayoutCache.ensurePathIsExpanded(VariableHeightLayoutCache.java:984) at javax.swing.tree.VariableHeightLayoutCache.setExpandedState(VariableHeightLayoutCache.java:182) at javax.swing.plaf.basic.BasicTreeUI.updateExpandedDescendants(BasicTreeUI.java:1696) at javax.swing.plaf.basic.BasicTreeUI$Handler.treeExpanded(BasicTreeUI.java:3805) at javax.swing.JTree.fireTreeExpanded(JTree.java:2764) at javax.swing.JTree.setExpandedState(JTree.java:3629) at javax.swing.JTree.expandPath(JTree.java:2212) at javax.swing.plaf.basic.BasicTreeUI.toggleExpandState(BasicTreeUI.java:2286) at javax.swing.plaf.basic.BasicTreeUI.handleExpandControlClick(BasicTreeUI.java:2273) at javax.swing.plaf.basic.BasicTreeUI.checkForClickInExpandControl(BasicTreeUI.java:2231) at javax.swing.plaf.basic.BasicTreeUI$Handler.handleSelection(BasicTreeUI.java:3600) at javax.swing.plaf.basic.BasicTreeUI$Handler.mousePressed(BasicTreeUI.java:3548) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:279) at java.awt.Component.processMouseEvent(Component.java:6530) at javax.swing.JComponent.processMouseEvent(JComponent.java:3324) at java.awt.Component.processEvent(Component.java:6298) at java.awt.Container.processEvent(Container.java:2236) at java.awt.Component.dispatchEventImpl(Component.java:4889) at java.awt.Container.dispatchEventImpl(Container.java:2294) at java.awt.Component.dispatchEvent(Component.java:4711) at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4888) at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4522) at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4466) at java.awt.Container.dispatchEventImpl(Container.java:2280) at java.awt.Window.dispatchEventImpl(Window.java:2746) at java.awt.Component.dispatchEvent(Component.java:4711) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758) at java.awt.EventQueue.access$500(EventQueue.java:97) at java.awt.EventQueue$3.run(EventQueue.java:709) at java.awt.EventQueue$3.run(EventQueue.java:703) at java.security.AccessController.doPrivileged(AccessController.java:0) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90) at java.awt.EventQueue$4.run(EventQueue.java:731) at java.awt.EventQueue$4.run(EventQueue.java:729) at java.security.AccessController.doPrivileged(AccessController.java:0) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80) at java.awt.EventQueue.dispatchEvent(EventQueue.java:728) 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$4.run(WaitDispatchSupport.java:227) at java.security.AccessController.doPrivileged(AccessController.java:0) at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:227) at java.awt.Dialog.show(Dialog.java:1084) at org.netbeans.core.windows.services.NbPresenter.superShow(NbPresenter.java:1086) at org.netbeans.core.windows.services.NbPresenter.doShow(NbPresenter.java:1136) at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:1108) at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:131) at org.netbeans.modules.openide.util.NbMutexEventProvider$Event.doEventAccess(NbMutexEventProvider.java:138) at org.netbeans.modules.openide.util.NbMutexEventProvider$Event.readAccess(NbMutexEventProvider.java:98) at org.netbeans.modules.openide.util.LazyMutexImplementation.readAccess(LazyMutexImplementation.java:94) at org.openide.util.Mutex.readAccess(Mutex.java:218) at org.netbeans.core.windows.services.NbPresenter.show(NbPresenter.java:1093) at java.awt.Component.show(Component.java:1671) at java.awt.Component.setVisible(Component.java:1623) at java.awt.Window.setVisible(Window.java:1014) at java.awt.Dialog.setVisible(Dialog.java:1005) at org.openide.explorer.propertysheet.CustomEditorAction.actionPerformed(CustomEditorAction.java:325) at org.openide.explorer.propertysheet.SheetTable.editCellAt(SheetTable.java:1135) at javax.swing.plaf.basic.BasicTableUI$Handler.adjustSelection(BasicTableUI.java:1108) at javax.swing.plaf.basic.BasicTableUI$Handler.mousePressed(BasicTableUI.java:1038) at 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:6530) at javax.swing.JComponent.processMouseEvent(JComponent.java:3324) at org.openide.explorer.propertysheet.SheetTable.processMouseEvent(SheetTable.java:833) at java.awt.Component.processEvent(Component.java:6298) at java.awt.Container.processEvent(Container.java:2236) at java.awt.Component.dispatchEventImpl(Component.java:4889) at java.awt.Container.dispatchEventImpl(Container.java:2294) at java.awt.Component.dispatchEvent(Component.java:4711) at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4888) at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4522) at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4466) at java.awt.Container.dispatchEventImpl(Container.java:2280) at java.awt.Window.dispatchEventImpl(Window.java:2746) at java.awt.Component.dispatchEvent(Component.java:4711) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758) at java.awt.EventQueue.access$500(EventQueue.java:97) at java.awt.EventQueue$3.run(EventQueue.java:709) at java.awt.EventQueue$3.run(EventQueue.java:703) at java.security.AccessController.doPrivileged(AccessController.java:0) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90) at java.awt.EventQueue$4.run(EventQueue.java:731) at java.awt.EventQueue$4.run(EventQueue.java:729) at java.security.AccessController.doPrivileged(AccessController.java:0) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80) at java.awt.EventQueue.dispatchEvent(EventQueue.java:728) 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)