title: J48 not working in weka explorer
body: <p>I am not able to use GUI of weka in linux (linux mint 9). 
  It doesn't allows me to use J48 from <a href="http://imageshare.web.id/images/fpux7tvf4y1oeesmw2.png" rel="nofollow">interface</a>, whereas I am able to run it from command prompt.</p>
  
  <p>Can anyone tell me what is can be the problem with it</p>