title: Passing $args as a substitution for vsim arguments gives an error
body: <p>I want to use $args as a substitution for some of the vsim arguments.</p>
  <blockquote>
  <h1>** UI-Msg: (vish-3296) Unknown option '-assertdebug -classdebug'</h1>
  </blockquote>
  <pre><code>vlog -sv time_diff_test.sv
  vopt time_diff_test +acc -o dbgver
  set args &quot;-assertdebug -classdebug&quot;
  vsim dbgver $args # error
  vsim dbgver -assertdebug -classdebug # runs fine
  </code></pre>
  <p>I think vsim is defined as a proc on the simulator(questasim) side and it recognizes the $args as a single argument. So it throws an error since no such argument is available. Do anybody know a workaround with this issue?</p>