title: Talend: tMap only generates Main outputs, not Lookup outputs
body: <p>When working with Talend, I find that when trying to create outputs for my tMap components, the only type I can create is <code>*New output* (Main)</code>. Yet, I need to create Lookup outputs.
  (to pipe to other tMaps that already have a Main input).</p>
  
  <p>Does somebody know the cause of this issue and/or a way to fix it?</p>