title: Trying to install new features in Eclipse (using ADT as the base package)
body: <p>When I try to install new features in Eclipse (using ADT as the base package) I get </p>
  
  <pre><code>‘Installing Software’ has encountered a problem.
  An error occurred while collecting items to be installed
  An error occurred while collecting items to be installed
  session context was:(profile=profile, hase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).  No repository found containing: osgi.bundle,com.android.ide.eclipse.base,21.1.0.v201302060044-569685
  No repository found containing: osgi.bundle,com.android.ide.eclipse.ddms,21.1.0.v201302060044-569685
  No repository found containing: org.eclipse.update.feature,com.android.ide.eclipse.ddms,21.1.0.v201302060044-569685
  </code></pre>
  
  <p>I have installed a number of addons and I’m not sure which one might be giving the error.  If anyone else has faced this error and found a solution, that would be great.  Thanks.</p>