No Closed Volume Found

Hello, I'm still really new to Hypermesh, but I'm really having a difficult time with creating solids.  I'm using Hypermesh v12.  I created an iges file from solidworks to mesh and could not create a solid, so I went back and  created a simpler one.  I made a simple solid cube and imported it into hypermesh.  When I tried to create a solid in hypermesh, the program gave me the error 'No closed volume found.'  I've checked this forum and found one similar post which was not resolved.  I checked and I do not have any discontinuous edges.  I choose 'By 2D Topo' to see if there were any and the cube wireframe turns blue.  I apologize since I'm sure this a very newbie post, but at this point I'm not sure where else to ask about this.  I appreciate any help!

Edit: The uploader won't let me upload hypermesh binary files (.hm) as well as iges or sldasm files.  It says 'You aren't permitted to upload this kind of file.'  I've just uploaded some screenshots instead.

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