title: Assembly not found, but not in references list
body: <p>I deploy my WebAPI project to IIS.</p>
  
  <p>I added a reference to ReportViewer.WebForms and ReportViewer.Commons, both with "Local Copy=True".</p>
  
  <p>When I try to create a "local report" using ReportViewer class, I get the following error message:</p>
  
  <pre><code>Die Datei oder Assembly "Microsoft.ReportViewer.ProcessingObjectModel, Version=10.0.0.0,
  Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" oder eine Abhängigkeit davon wurde
  nicht gefunden. Das System kann die angegebene Datei nicht finden.
  </code></pre>
  
  <p>I had the very same error, just with Commons, when I forgot to add Commons to the references list. My problem is that I can't add this reference, for I don't find ProcessingObjectModel in the list of references.</p>
  
  <p>What shall I do?</p>