title: The value "" of the "Project" attribute in element <Import> is invalid. vs2012
body: <p>I'm getting the following error while trying to load some projects in visual studio 2012:</p>
  
  <pre><code>G:\path\project.csproj : error  : The value "" of the "Project" attribute in element &lt;Import&gt; is invalid. Parameter "path" cannot have zero length.
  </code></pre>
  
  <p>I'm trying this with a fresh start on the machine after a svn checkout. These projects can be loaded on other machines correctly.</p>
  
  <p>Can some one help me out with this one? Google didn't give me the answer, I hope SO will.</p>
  
  <p><strong>EDIT</strong></p>
  
  <p>This is the relevant part of the csproj file.</p>
  
  <pre><code>&lt;Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"&gt;
    &lt;Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" /&gt;
  
    &lt;Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" /&gt;
    &lt;Import Project="$(StyleCopTargets)" /&gt;
  
  &lt;/Project&gt;
  </code></pre>