Have been openning a Solidworks dxf. in AutoSketch, editing, then renaming & saving as a dxf. This has workrd fine for months. Now it just stopped. It will go through the motions and save the new dxf, but trying to reopen the new dxf will give me an "Import Error". It will save fine as a sketch file, just not a dxf. What's the deal? Anybody else have this issue?