title: Pyomo can't locate GLPK solver
body: <p>I'm trying to use the GLPK solver with Pyomo. I have a working model that's been tested, but keep getting an error saying GLPK can't be found. </p>
  
  <blockquote>
    <p>WARNING: Could not locate the 'glpsol' executable, which is required for solver 'glpk'</p>
  </blockquote>
  
  <p>I've installed glpk sucessfully. I also added the directory to my path variable so the executed can be called globally. I tested this with glpsol --help from my command line, and see the help info printed. </p>
  
  <p>The below thread says it should be working, but alas, it is not. </p>
  
  <p><a href="https://stackoverflow.com/questions/20690195/how-do-you-install-glpk-solver-along-with-pyomo-in-winpython">How do you install glpk-solver along with pyomo in Winpython</a></p>
  
  <p>Any ideas?</p>