title: CpoException: Can not execute command 'cpoptimizer -angel'. Please check availability of required executable file
body: <p>I have <strong>CPLEX Optimization Studio</strong> installed on my Ubuntu machine and I am using the <code>docplex</code> model module with success. Now I have to use <strong>CpoModel</strong> from <code>docplex.cp.model</code> and I have the error: </p>
  
  <blockquote>
    <p>CpoException: Can not execute command 'cpoptimizer -angel'. Please check availability of required executable file.</p>
  </blockquote>
  
  <p>I have no idea what's going on. I cannot get support from <strong>IBM</strong> because I have student license.</p>