hibernate + middlegen

Hello!

I´m trying to user middlegen (hibernate 
distribution), to create hbm.xml Files (Hibernate) 
from an JDBC Connection.

After typing ant to run the default example,
the window opens and displays all tables
correctly. 
But when i hit the generate button, the
following error occurs:

java.lang.ClassNotFoundException: middlegen.DontCloseLog4JLogSystem
        at java.net.URLClassLoader$1.run(URLClassLoader.java:199)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:187)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:289)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:274)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:141)
        at 
org.apache.velocity.runtime.log.LogManager.createLogSystem(LogManager.java:161)
        at 
org.apache.velocity.runtime.RuntimeInstance.initializeLogger(RuntimeInstance.java:533)
        at 
org.apache.velocity.runtime.RuntimeInstance.init(RuntimeInstance.java:267)
        at 
org.apache.velocity.runtime.RuntimeInstance.init(RuntimeInstance.java:441)
        at 
org.apache.velocity.app.VelocityEngine.init(VelocityEngine.java:148)
        at middlegen.Plugin.getEngine(Plugin.java:570)
        at middlegen.Plugin.generate(Plugin.java:512)
        at middlegen.Middlegen.writeSource(Middlegen.java:415)
        at middlegen.swing.JMiddlegenFrame
$1.actionPerformed(JMiddlegenFrame.java:67)
        at 
javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1786)
        at javax.swing.AbstractButton
$ForwardActionEvents.actionPerformed(AbstractButton.java:1839)
        at 
javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
        at 
javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
        at 
javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:245)
        at java.awt.Component.processMouseEvent(Component.java:5100)
        at java.awt.Component.processEvent(Component.java:4897)
        at java.awt.Container.processEvent(Container.java:1569)
        at java.awt.Component.dispatchEventImpl(Component.java:3615)
        at java.awt.Container.dispatchEventImpl(Container.java:1627)
        at java.awt.Component.dispatchEvent(Component.java:3477)
        at 
java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3483)
        at 
java.awt.LightweightDispatcher.processMouseEvent(Container.java:3198)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3128)
        at java.awt.Container.dispatchEventImpl(Container.java:1613)
        at java.awt.Window.dispatchEventImpl(Window.java:1606)
        at java.awt.Component.dispatchEvent(Component.java:3477)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:456)
        at 
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
        at 
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
        at 
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
        at 
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)
middlegen.MiddlegenException: middlegen.DontCloseLog4JLogSystem

It would be nice, if anyone can help to solve this problem.

Greetings,
W.



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