Hello,
i've built a gwt project  with projectCreator and applicationCreator.I
have the default page when i try to run my project.It works
correctly.But when i modify the  application class MyApplication and i
write this code

package com.gwt.client;

import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.user.client.ui.RootPanel;
import com.gwtext.client.widgets.Panel;

/**
 * Entry point classes define <code>onModuleLoad()</code>.
 */
public class MyApplication implements EntryPoint {

  /**
   * This is the entry point method.
   */
private  LoginApplicationWindow window;
  public void onModuleLoad() {
          Panel panel = new Panel();
          RootPanel.get().add(panel);

  }
} and i run it i have this error

[ERROR] Unable to load module entry point class
com.gwt.client.MyApplication (see associated exception for details)
com.google.gwt.core.client.JavaScriptException: (TypeError):
'$wnd.Ext.StatusBar' a la valeur Null ou n'est pas un objet.
 number: -2146823281
 description: '$wnd.Ext.StatusBar' a la valeur Null ou n'est pas un
objet.
        at com.gwtext.client.widgets.Component.checkExtVer(Native Method)
        at com.gwtext.client.widgets.Component.<clinit>(Component.java:108)
        at com.gwt.client.MyApplication.onModuleLoad(MyApplication.java:17)
Can you explain me why i have this error and what can i resolve it?

Arnaud


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