java.lang.NullPointerException
        at org.netbeans.modules.db.explorer.dlg.AddTableColumnDialog.updateState(AddTableColumnDialog.java:481)
        at org.netbeans.modules.db.explorer.dlg.AddTableColumnDialog.access$000(AddTableColumnDialog.java:85)
        at org.netbeans.modules.db.explorer.dlg.AddTableColumnDialog$2.actionPerformed(AddTableColumnDialog.java:194)
        at javax.swing.JComboBox.fireActionEvent(JComboBox.java:1240)
        at javax.swing.JComboBox.setSelectedItem(JComboBox.java:567)
        at javax.swing.JComboBox.setSelectedIndex(JComboBox.java:599)
        at javax.swing.plaf.basic.BasicComboPopup$Handler.mouseReleased(BasicComboPopup.java:839)
        at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:273)
        at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
        at java.awt.Component.processMouseEvent(Component.java:6348)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
        at java.awt.Component.processEvent(Component.java:6113)
        at java.awt.Container.processEvent(Container.java:2085)
        at java.awt.Component.dispatchEventImpl(Component.java:4714)
        at java.awt.Container.dispatchEventImpl(Container.java:2143)
        at java.awt.Component.dispatchEvent(Component.java:4544)
        at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4618)
        at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4282)
        at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4212)
        at java.awt.Container.dispatchEventImpl(Container.java:2129)
        at java.awt.Window.dispatchEventImpl(Window.java:2475)
        at java.awt.Component.dispatchEvent(Component.java:4544)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:635)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:117)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:205)
        at java.awt.Dialog$1.run(Dialog.java:1045)
        at java.awt.Dialog$3.run(Dialog.java:1097)
        at java.security.AccessController.doPrivileged(AccessController.java:0)
        at java.awt.Dialog.show(Dialog.java:1095)
        at org.netbeans.core.windows.services.NbPresenter.superShow(NbPresenter.java:985)
        at org.netbeans.core.windows.services.NbPresenter.doShow(NbPresenter.java:1019)
        at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:1007)
        at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:115)
        at org.openide.util.Mutex.doEventAccess(Mutex.java:1355)
        at org.openide.util.Mutex.readAccess(Mutex.java:268)
        at org.netbeans.core.windows.services.NbPresenter.show(NbPresenter.java:992)
        at java.awt.Component.show(Component.java:1563)
        at java.awt.Component.setVisible(Component.java:1515)
        at java.awt.Window.setVisible(Window.java:841)
        at java.awt.Dialog.setVisible(Dialog.java:985)
        at org.netbeans.modules.db.explorer.dlg.AddTableColumnDialog.showDialog(AddTableColumnDialog.java:595)
        at org.netbeans.modules.db.explorer.dlg.CreateTableDialog$5.actionPerformed(CreateTableDialog.java:245)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2028)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2351)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
        at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
        at java.awt.Component.processMouseEvent(Component.java:6348)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
        at java.awt.Component.processEvent(Component.java:6113)
        at java.awt.Container.processEvent(Container.java:2085)
        at java.awt.Component.dispatchEventImpl(Component.java:4714)
        at java.awt.Container.dispatchEventImpl(Container.java:2143)
        at java.awt.Component.dispatchEvent(Component.java:4544)
        at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4618)
        at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4282)
        at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4212)
        at java.awt.Container.dispatchEventImpl(Container.java:2129)
        at java.awt.Window.dispatchEventImpl(Window.java:2475)
        at java.awt.Component.dispatchEvent(Component.java:4544)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:635)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:117)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:205)
        at java.awt.Dialog$1.run(Dialog.java:1045)
        at java.awt.Dialog$3.run(Dialog.java:1097)
        at java.security.AccessController.doPrivileged(AccessController.java:0)
        at java.awt.Dialog.show(Dialog.java:1095)
        at org.netbeans.core.windows.services.NbPresenter.superShow(NbPresenter.java:985)
        at org.netbeans.core.windows.services.NbPresenter.doShow(NbPresenter.java:1019)
        at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:1007)
        at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:115)
        at org.openide.util.Mutex$1AWTWorker.run(Mutex.java:1370)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:199)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:633)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:117)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)