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Hi, I have an urgent problem that I'd be really grateful for some help with. I've built a model in AutoCAD 2013 - which is the software Ihave available - and I need to export it to SketchUp in order to transfer itfurther to yet another program. But I get stuck on just getting it saved in an old enough AutoCAD-version. It all looks fine in AutoCAD 2013, but when I try saving as a 2007-file and then import it in SketchUp almost everything is lost. The model consists of surfaces, and a few that originally were made in AutoCAD 2000 remain, but all the others are considered incompatible and are simply disregarded. On forums concerning SketchUp it is stated that surfaces based on splines are not supported and I guess all my swept surfaces are then not accepted, but how canI convert my model - or the surfaces - to something edible for SketchUp or even the old AutoCAD 2000-version I still have on my old computer? Exactly the same thing happens there, the surfaces that show up in 2000 are the same that show up in SketchUp. I have tried converting to 2007 and 2000, and just save as 2007 and 2000 drawings, I've broken the connection between the lines used to create the surfaces and the surfaces themselves and nothing seem to help. Its a rather large model that has taken me weeks to build and I should have been finished weeks ago, so I'm a bit desperate and I definitely don't want to have to redo the entire project....