title: Specified condition "$(CleanWPPAllFilesInSingleFolder)" evaluates to "" instead of a boolean.
body: <p>At first my only problem was that while trying to publish I clicked on <code>Start Preview</code> and got this error:</p>
  
  <pre><code>Specified condition "$(CleanWPPAllFilesInSingleFolder)" evaluates to "" instead of a boolean. 
  </code></pre>
  
  <p>then searching for solution on the internet made my problem worse to the point that I can not load the project any more with the same error.</p>
  
  <pre><code>C:\Users\Syed Farjad Zia Zaid\documents\visual studio 2013\Projects\SageInventrica\SageInventrica\SageInventrica.csproj : error  : Specified condition "$(CleanWPPAllFilesInSingleFolder)" evaluates to "" instead of a boolean.  C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v12.0\Web\Microsoft.Web.Publishing.targets
  </code></pre>
  
  <p>Naturally I tried to search for a solution and tried all possible combinations of deleting <code>.user</code>, <code>.suo</code>, closing and opening Visual Studio etc but nothing helped me except for deleting this File:</p>
  
  <pre><code>C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v12.0\Web\Microsoft.Web.Publishing.targets
  </code></pre>
  
  <p>But then I can not publish a zip getting the error: </p>
  
  <pre><code>The target "Package" does not exist in the project.
  </code></pre>
  
  <p>and when I try to publish to Server Directly I get the error:</p>
  
  <pre><code>The target "MSDeployPublish" does not exist in the project.
  </code></pre>
  
  <p>I have been trying to find the solution for this for about 2 days now. May be I am not looking at the right places but I really need help to fix this...</p>
  
  <p>Thanks</p>