Don't use SpaceClaim is the simple answer.

SolidWorks and DesignModeler both use the Parasolid kernel so there is no translation when importing the file, DM just reads the file and Parasolid renders the geometry.

SpaceClaim does not use the Parasolid kernel so SC must translate the data from Parasoilid to another kernel. Something in the data does not translate cleanly. This is often caused by degenerate geometry features. If you do some geometry repair in either SW or DM, you might succeed in getting it to translate into SC or you could just work in DM.