We export our sheet metal parts as a dxf. In some cases, we may not want to have hole features exported, so I use the 'Remove Entites' feature in the dxf window to remove the holes. Draftsight will show the holes removed (Autocad also). But, when I open the dxf file in our Trumpf Laser software, Tops, the holes are there. My layout dept may not know that I dont want some features in the file cut. The only way to verify that features have been removed is to check the Tops file personally. Solidworks should remove the features permanently.