title: How do I execute the command 'appcfg rollback'?
body: <p>While uploading the project , there was a network failure and I had to stop, when the uploading process was only 31% complete. Now when I click to deploy application to google app engine the following message is produced :</p>
  
  <pre><code>com.google.appengine.tools.admin.HttpIoException: Error posting to URL: 
  https://appengine.google.com/api/appversion/create?app_id=programworks&amp;version=1&amp;
  409 Conflict
  Another transaction by user suhailgupta03 is already in progress for app: 
  s~programworks, version: 1. That user can undo the transaction with 
  "appcfg rollback".
  
  Unable to update app: Error posting to URL: https://appengine.google.com/api/appversion/create?app_id=programworks&amp;version=1&amp;
  409 Conflict
  Another transaction by user suhailgupta03 is already in progress for app: 
  s~programworks, version: 1. That user can undo the transaction with "appcfg rollback".
  </code></pre>
  
  <p>I open my shell prompt and type in there <code>appcfg rollback</code> but I get a message that this command is not found.I have installed google app engine as a plugin for netbeans.</p>
  
  <p>The path where I have kept the jars of google app engine : <code>/home/non-admin/appengine-java-sdk-1.6.6/lib/</code></p>
  
  <p>Please tell what should I do to rollback the previous process ? I badly need to upload the <em>war</em> file.!</p>