title: OperationalError: (OperationalError) unable to open database file None None
body: <p>Trying to format a database using SQLAlchemy but when I run create_all on the metadata, I get the above error. I created the engine using the following path for user Tyre77:</p>
  
  <pre><code>engine = create_engine('sqlite:////tyre77/OmniCloud/database.db')
  </code></pre>
  
  <p>I've walked through and there is a file 'database.db' at that path, but perhaps I typed it wrong?</p>