https://forums.autodesk.com/t5/inventor-forum/surface-model-not-visible-in-assembly/m-p/5647228#M389420 <BLOCKQUOTE><HR />@Anonymous wrote:<BR /> <P>Was this ever resolved? I am having a similar issue. (Just wondering as I wait&nbsp;for Inventor to stitch the surfaces)</P> <HR /></BLOCKQUOTE> <P>Resolved? &nbsp;What is the issue? &nbsp;If you are waiting for Inventor to stitch surfaces - then something isn't set up correctly.</P> <P>&nbsp;</P> <P>The problem could be with your Import Options, but it is far more likely with the quality of the neutral format output, the source.</P> <P>The trick is learning how to deal with imported geometry.</P> <P>I generally segregate&nbsp;into Groups in the Construction Environment before attempting&nbsp;any Stitching.</P> <BLOCKQUOTE>Can you attach your file here?<BR />Each file is different - so this is a issue unique to each file, &nbsp;not to the CAD software.</BLOCKQUOTE> <P>&nbsp;</P> Thu, 21 May 2015 17:17:24 GMT JDMather 2015-05-21T17:17:24Z