title: BPSim issue (Tag 'bpmn:relationship' is not imported.)
body: <p>I'm testing now the BPSim and after the installation, when I wanted to validate the settings i'm getting this warning:</p>
  
  <p>BPMN Warning : Tag 'bpmn:relationship' is not imported. Either this file is not conforming to BPMN 2.0 Specification or EA currently does not support it.</p>
  
  <p>The model i'm testing it on is a very simple BPMN (start, activity, stop)</p>
  
  <p>What I need to to to resolve this warning?
  As when I started to add resources I'm getting errors on resources reference</p>
  
  <p>BPMN Error : ResourceRole '1st line': sub-element 'resourceRef' is not referencing to a Resource.(value 'EAID_2A118149_3458_4552_8E1E_74B7937FC3F1')</p>
  
  <p>which I could not resolve either (all tagged values seems to point to proper objects) and i think it may be related to the warning.</p>
  
  <p>Any clues?
  Thank you</p>