We noticed that when we do "save a copy" from Pro/E to an AutoCAD dxf or dwg file, if the view is a section view, it created a double line. I figured out that in the "Entities" tab, you have to set the radio button for "Hatching" to be "As Separated Entities" and then it won't do it. What I'm looking for is something within the config.pro to make this the default pick because it doesn't save it from session to session. Our CNC programmer guys noticed it when we switched from WF3.0 to WF4.0 when they tried to do a "PEDIT" in AutoCAD and turn the segments into one polyline.