title: The project cannot be built until its prerequisite PokerGameEngine is built. Cleaning and building all projects is recommended
body: <p>The project cannot be built until its prerequisite PokerGameEngine is built. Cleaning and building all projects is recommended  PokerExtension      Unknown Java Problem</p>
  
  <p>in eclipse</p>
  
  <p>it shows red cross mark on project.</p>
  
  <p>i have done build automatically and clean all  in eclipse for all projects</p>
  
  <p>but it shows red cross</p>