title: Ant build won't run in Eclipse
body: <p>I have an Ant build.xml which no longer runs when launched in Eclipse.<br>
  I click on the External Tools Configuration, select the Ant Build I've been running, and click Run.<br>
  Nothing happens -- no console window and the build doesn't appear to launch (the classes are not compile nor is the WAR file created).  </p>
  
  <p>I recently added a plugin (Spring IDE), this is the only thing I can think of that has changed recently as far as my Eclipse configuration.<br>
  I can run the Ant build fine from the command line.</p>
  
  <p>Can anyone suggest where I might look to track down my error?</p>
  
  <p>I'm using the Eclipse Helios release, Build id: 20100617-1415 on Windows XP.</p>