title: How do I install Aptana plugin in Eclipse 3.7?
body: <p>I'm trying to install the Aptana Studio 3 plugin into Eclipse 3.7 on Ubuntu, but it is failing with the message</p>
  
  <pre><code>An error occurred while collecting items to be installed
  session context was:(profile=PlatformProfile, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
  No repository found containing: osgi.bundle,org.eclipse.jdt.core,3.7.0.dist
  No repository found containing: osgi.bundle,org.eclipse.jdt.core.manipulation,1.4.0.dist
  No repository found containing: osgi.bundle,org.eclipse.jdt.debug,3.7.0.dist
  No repository found containing: osgi.bundle,org.eclipse.jdt.launching,3.6.0.dist
  No repository found containing: osgi.bundle,org.eclipse.jdt.ui,3.7.0.dist
  No repository found containing: osgi.bundle,org.junit,3.8.2.v3_8_2_v20100427-1100
  </code></pre>
  
  <p>The package URL I'm using is <a href="http://download.aptana.com/studio3/plugin/install" rel="nofollow">http://download.aptana.com/studio3/plugin/install</a>. What am I doing wrong? </p>
  
  <p><strong>Update:</strong> I followed sgibly's advice below and now the install gets to about 49% before failing with this message:</p>
  
  <pre><code>An error occurred while collecting items to be installed
  session context was:(profile=PlatformProfile, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
  Comparison method violates its general contract!
  Comparison method violates its general contract!
  </code></pre>