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java.util.NoSuchElementException: node has no children at javax.swing.tree.DefaultMutableTreeNode.getFirstChild(DefaultMutableTreeNode.java:864) at org.hsqldb.util.DatabaseManagerSwing$PopupListener.getCommandString(DatabaseManagerSwing.java:2114) at org.hsqldb.util.DatabaseManagerSwing$PopupListener.toString(DatabaseManagerSwing.java:2046) at org.hsqldb.util.DatabaseManagerSwing.handlePopup(DatabaseManagerSwing.java:1999) at org.hsqldb.util.DatabaseManagerSwing.mouseReleased(DatabaseManagerSwing.java:1960) at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:273) at java.awt.Component.processMouseEvent(Component.java:6263) at javax.swing.JComponent.processMouseEvent(JComponent.java:3267) at java.awt.Component.processEvent(Component.java:6028) at java.awt.Container.processEvent(Container.java:2041) at java.awt.Component.dispatchEventImpl(Component.java:4630) at java.awt.Container.dispatchEventImpl(Container.java:2099) at java.awt.Component.dispatchEvent(Component.java:4460) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168) at java.awt.Container.dispatchEventImpl(Container.java:2085) at java.awt.Window.dispatchEventImpl(Window.java:2478) at java.awt.Component.dispatchEvent(Component.java:4460) at java.awt.EventQueue.dispatchEvent(EventQueue.java:599) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)