title: Jenkins MSBuild returns msb1009 "Project file does not exist"
body: <p>I am trying to perform a .NET build with MSBuild in Jenkins on a Windows server, and no matter what I do, I get an error <code>MSBUILD : error MSB1009: Project file does not exist.</code></p>
  <p>The command being run correctly defines the name of the sln file, and I have even tried to define the full path to the file with <code>%WORKSPACE%\project.sln</code>, but neither fix the issue.</p>
  <p>How can I resolve the problem?</p>