title: Team Build: The path 'Path' is already mapped in workspace 'workspace' error even after deleting all workspaces on build agent
body: <p>I have this problem when I queue a build.  The build dies with the error</p>
  
  <blockquote>
    <p>The path C:\[Path]\Sources is already mapped in workspace [Server Name].</p>
  </blockquote>
  
  <p>the <a href="https://stackoverflow.com/questions/226288/team-build-error-the-path-is-already-mapped-to-workspace">same as this question</a>. but I've removed all the workspaces on the build agent by running this command:</p>
  
  <pre><code>tf workspaces /remove:*
  </code></pre>
  
  <p>and also by deleting the TFS cache folder.  I've also restarted the server, but the error keeps happening on each build.</p>