title: VB 6: The project not be built because it references a project which does not have a binary compatibility file set
body: <p>I haven't done VB 6 development for nearly a decade. Any advice on how to deal with this error?</p>
  
  <pre><code>The project 'ProjectB' can not be built because it 
  references project 'C:\VSS\Foo\ProjectA\ProjectA.vbp'
  which does not have a binary compatibility file set.
  </code></pre>