title: Project '<project name>' is not up to date. Input file '<static file>' is modified after output file ''
body: <p>I'm creating a typescript project (Project type - Web Application with Typescript), that includes typescript, javascript and other static files.</p>
  
  <p>I'm using the Visual Studio 2015 build environment, and the Microsoft.TypeScript.MSBuild.1.8.11 nuget package for the actual compilation (i.e. not using tsconfig.json). </p>
  
  <p>I have a Post-build event task which has the side effect of 'touch'ing some of these static files. When I subsequently trigger another build, I get a warning in the output*:</p>
  
  <pre><code>Project '&lt;project name&gt;' is not up to date.
  Input file '&lt;static file&gt;' is modified after output file ''.`
  </code></pre>
  
  <p>and the project is forced to rebuild.</p>
  
  <p>Can anyone think how I can work out what VS2015 is referring to when it talks about "<code>output file ''</code>"?</p>
  
  <ul>
  <li>I've got MSBuild set to output Diagnostic information in the Tools->Options->Build And Run settings.</li>
  </ul>