title: Error "AdbCommandRejectedException: device not found" in Eclipse using Android emulator
body: <p>I've tried to change the build of an application, and now eclipse doesn't work.</p>
  
  <p>There is nothing in the console, and when I launch the debug, there is nothing on the log.</p>
  
  <p>I just got this message :</p>
  
  <pre><code>[2011-03-31 11:22:58 - Logcat]device not found
  com.android.ddmlib.AdbCommandRejectedException: device not found
      at com.android.ddmlib.AdbHelper.setDevice(AdbHelper.java:736)
      at com.android.ddmlib.AdbHelper.executeRemoteCommand(AdbHelper.java:373)
      at com.android.ddmlib.Device.executeShellCommand(Device.java:284)
      at com.android.ddmuilib.logcat.LogPanel$3.run(LogPanel.java:527)
  </code></pre>