title: What does this message mean:"Please check the Tcl console output"?
body: <p>I have tried to run this code, using Vivado 2014.4 but this error appeared to me: </p>
  
  <p><strong>"[USF-XSim-62] 'compile' step failed with error(s). Please check the Tcl console output"</strong></p>
  
  <p>the code:</p>
  
  <p><a href="https://github.com/cjameshuff/vhdlstuff/blob/master/xorshift.vhd" rel="nofollow">xorshift.vhd</a></p>
  
  <p><a href="https://github.com/cjameshuff/vhdlstuff/blob/master/xorshift_tb.vhd" rel="nofollow">xorshift_tb.vhd</a></p>
  
  <p>What is the error in the code?</p>