title: Jenkins error: MSB1008: Only one project can be specified
body: <p>I use Jenkins version 1.500. I simply want to build my asp.net project, but I get this message:</p>
  
  <pre><code>Path To MSBuild.exe: C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSbuild.exe
  Executing the command cmd.exe /C C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSbuild.exe %WORKSPACE%\trunk\src\GoldFingers.Uk.sln &amp;&amp; exit %%ERRORLEVEL%% from C:\Program Files (x86)\Jenkins\jobs\GoldFingers-Build\workspace
  [workspace] $ cmd.exe /C C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSbuild.exe %WORKSPACE%\trunk\src\GoldFingers.Uk.sln &amp;&amp; exit %%ERRORLEVEL%%
  Microsoft (R) Build Engine Version 4.0.30319.1
  [Microsoft .NET Framework, Version 4.0.30319.1]
  Copyright (C) Microsoft Corporation 2007. All rights reserved.
  
  MSBUILD : error MSB1008: Only one project can be specified.
  Switch: Files
  
  For switch syntax, type "MSBuild /help"
  Build step 'Build a Visual Studio project or solution using MSBuild' marked build as failure
  Finished: FAILURE
  </code></pre>
  
  <p>Do you know why it is failure? Maybe the old version od Jenkins?
  Please, help.</p>