title: FloPy: Have trouble with the usage of Mt3DMS
body: <p>I tried to reproduce the study area, but the problem of this crashed me.</p>
  <pre><code>MT3DMS - Modular 3-D Multi-Species Transport Model [Version 5.30]
  Developed at University of Alabama for U.S. Department of Defense
  
  Using NAME File: mt.nam                                            
  The value of the STATUS specifier in an OPEN statement does not match the file status (unit=10).
   Error occurs at or near line 163 of _btn5open_                       
   Called from or near line 169 of _MAIN__    
  </code></pre>
  <p>The 'Flow Direction' can successfully appear, but the MT3DMS doesn't work as wished.<a href="https://i.stack.imgur.com/E9zug.png" rel="nofollow noreferrer">https://i.stack.imgur.com/E9zug.png</a></p>