title: Typescript giving "Output Generation Failed" in Visual Studio 2012 with 0.9.5
body: <p>I've been using Typescript 0.9.5 for the last few days, and then suddenly today the JavaScript files just stopped being generated. I see an error "Output generation failed" in the Visual Studio status bar, but nothing in any of the output windows.</p>
  
  <p>I've rebooted, and restarted Visual Studio, disabled Web Essentials, tried all the usual things.</p>
  
  <p>The files are set as TypescriptCompile in the properties. I've tried adding new files, or editing old ones with no effect. The Project file hasn't been changed as far as I can tell (its in TFS and none of the TypeScript sections have been altered).</p>
  
  <p>I've made sure both files are checked out, still nothing.</p>
  
  <p>Update: I've managed to compile manually using tsc.exe from the command line, so it must be something in Visual Studio.</p>