Problem exporting to dxf

Hi guys.  I am having a little trouble exporting a model to DXF and keeping the endpoints closed.  I have a feeling it has something to do with the "enable endpoint merging" in the options menu, but nothing I do there fixes it.  The final DXF will be imported in to CorelDraw and cut on a laser, so continuous segments are much preferred.  I will try to include a pic of an "open" endpoint.  Thanks!

SolidworksImport export