title: Troubleshooting error MSB4018: The "SetInclusionListEntry" task failed unexpectedly
body: <p>I am using Jenkins with Ant to build a VSTO Project on our build machine.  Yesterday it was building fine, now today I am getting the following error:</p>
  
  <pre><code>   [exec] Project "C:\Program Files (x86)\Jenkins\jobs\ProjectDir\workspace\ProjectDir\MyProject\MyProject.csproj" on node 1 (Rebuild target(s)).
       [exec] C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v11.0\OfficeTools\Microsoft.VisualStudio.Tools.Office.targets(668,9): error MSB4018: The "SetInclusionListEntry" task failed unexpectedly. [C:\Program Files (x86)\Jenkins\jobs\ProjectDir\workspace\ProjectDir\MyProject\MyProject.csproj]
       [exec] C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v11.0\OfficeTools\Microsoft.VisualStudio.Tools.Office.targets(668,9): error MSB4018: System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.VisualStudio.Tools.Office.Runtime, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified. [C:\Program Files (x86)\Jenkins\jobs\ProjectDir\workspace\ProjectDir\MyProject\MyProject.csproj]
  </code></pre>
  
  <p>I reverted the code to the last known working commit. The code builds fine on my local dev machine.</p>
  
  <p>Any idea about what could have changed on the build machine to cause this?</p>