title: Autodesk Forge import IFC failed
body: <p>our customer try to show IFC model through method <a href="https://developer.api.autodesk.com/oss/v2/buckets/bucket_name/objects/model_name" rel="nofollow noreferrer">https://developer.api.autodesk.com/oss/v2/buckets/bucket_name/objects/model_name</a>. IFC model is huge, about 100km, it is road design. He can't show it in Forge, he got error that model is empty, although it has 120MB. Model is in IFC4. Has You any documentation to supported IFC classes, or model size to show in FOrge ? He try to divide model to smaller parts, but nothing happen.</p>
  
  <p>Milan Nemec, Graitec </p>