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java.lang.NoClassDefFoundError: org/javagroups/MessageListener	at java.lang.ClassLoader.defineClass0(Native Method)	at java.lang.ClassLoader.defineClass(Unknown Source)	at java.security.SecureClassLoader.defineClass(Unknown Source)	at java.net.URLClassLoader.defineClass(Unknown Source)	at java.net.URLClassLoader.access0(Unknown Source)	at java.net.URLClassLoader.run(Unknown Source)	at java.security.AccessController.doPrivileged(Native Method)	at java.net.URLClassLoader.findClass(Unknown Source)	at java.lang.ClassLoader.loadClass(Unknown Source)	at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)	at java.lang.ClassLoader.loadClass(Unknown Source)	at java.lang.ClassLoader.loadClassInternal(Unknown Source)	at org.hsqldb.jdbcConnection.openStandalone(Unknown Source)	at org.hsqldb.jdbcConnection.(Unknown Source)	at org.hsqldb.jdbcDriver.connect(Unknown Source)	at java.sql.DriverManager.getConnection(Unknown Source)	at java.sql.DriverManager.getConnection(Unknown Source)	at org.hsqldb.util.ConnectionDialog.createConnection(Unknown Source)	at org.hsqldb.util.ConnectionDialog.actionPerformed(Unknown Source)	at java.awt.Button.processActionEvent(Unknown Source)	at java.awt.Button.processEvent(Unknown Source)	at java.awt.Component.dispatchEventImpl(Unknown Source)	at java.awt.Component.dispatchEvent(Unknown Source)	at java.awt.EventQueue.dispatchEvent(Unknown Source)	at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)	at java.awt.EventDispatchThread.run(Unknown Source)