title: Gensim mallet CalledProcessError: returned non-zero exit status
body: <p>I'm getting an error while trying to access gensims mallet in jupyter notebooks.  I have the specified file 'mallet' in the same folder as my notebook, but cant seem to access it.  I tried routing to it from the C drive but I still get the same error.  Please help :)</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>import os
  from gensim.models.wrappers import LdaMallet
  
  #os.environ.update({'MALLET_HOME':r'C:/Users/new_mallet/mallet-2.0.8/'})
  
  mallet_path = 'mallet' # update this path
  
  ldamallet = gensim.models.wrappers.LdaMallet(mallet_path, corpus=bow_corpus, num_topics=20, id2word=dictionary)
  
  result = (ldamallet.show_topics(num_topics=3, num_words=10,formatted=False))
  for each in result:
      print (each)</code></pre>
  </div>
  </div>
  </p>
  
  <p><a href="https://i.stack.imgur.com/xcjPF.png" rel="noreferrer"><img src="https://i.stack.imgur.com/xcjPF.png" alt="Mallet Error CalledProcessError"></a></p>
  
  <p><a href="https://i.stack.imgur.com/DZJFr.png" rel="noreferrer"><img src="https://i.stack.imgur.com/DZJFr.png" alt="enter image description here"></a></p>