title: error when installing ObjectAid on eclipse
body: <p>I am trying to install <code>Objectaid</code> for Eclipse Juno 4.2.1. I did all steps found on the <a href="http://www.objectaid.com/installation" rel="nofollow">Installation from ObjectAid Documentation</a> but still having this error:</p>
  
  <pre><code>An error occurred while installing the items
  session context was:(profile=profile,    phase=org.eclipse.equinox.internal.p2.engine.phases.Install, operand=null --&gt;     [R]com.objectaid.uml 1.1.5, action=).
  Failed to prepare partial IU: [R]com.objectaid.uml 1.1.5.
  </code></pre>
  
  <p>I've done <code>Help &gt; Install New Software &gt; Available Software Site</code> and then remove <code>ObjetAid UML Explorer</code> but it didn't work. <strong>So I am wondering if there is another thing I can do to achieve the installation?</strong></p>