I have read some previous posts regarding this being an issue. In most cases, the common explanation for problems exporting to AI is that Illustrator can’t handle objects with architecture scale dimensions. I don’t believe this applies to my circumstance, but it has never been clarified what a good ‘cut off point’ for units is in Illustrator. In any case, I never had an issue exporting anything I made in Rhino 4 of similar scales. I learned Rhino using Rhino 4, and my workflow developed as such. I never once had a conflict exporting my Rhino data (normally viewport snapshots) into AI files. Now with Rhino 5, I simply can NOT get Illustrator to open any files I export. I have had one or two instances where it has worked, but by far I spend more time trying to tweak my files to export them than I do building them. I often resort to saving the file as a Rhino 4 3dm and exporting it at home on my personal copy of Rhino 4. Most of what I work on isn’t large scale, and by all means isn’t complex. I work for an art gallery and much of what I do involves preparing sketches with dimensions, to aid people in building approrpiate sized pedestals or crates for artworks. Key to my workflow is being able to export viewport snapshots (particularly the perspective viewport) as AI files, to be edited and saved as PDFs to send to our clients. With the update to Rhino 5, this easy workflow I developed using Rhino 4 now seems impossible. I am happy to provide files or anything to help resolve the situation. I assume you know that Rhino is capable of exporting a pdf itself by using the Print dialogue box. What is it that needs to be done in AI that can’t be done in Rhino? Thanks for the tip… Naturally I totally overlooked that Rhino is capable of exporting PDFs. I will try that and see how it works. Thanks for the tip. Strangely enough I noticed the problem exporting AI files doesn’t occur in the Rhino 5 OSX beta. Which I just tried after my original post. Perhaps part of the issue is that our liscense for Adobe is Mac only, and Rhino is only officially released for use in windows. Operating across platforms could contribute to the problems I am experiencing. Mostly I use illustrator to include photographs of the artworks and place multiple perspective views together in the same document/page. Doing the layout work, deleting unnecessary wireframe lines and making the final document generally readable for the recipients are the main reasons I like using Illustrator. Working with the wireframe and building the entire objects I do completely in Rhino naturally. That’s interesting… at the top of the Print dialogue box under ‘Destination’, set the pull-down to Adobe PDF (you can also choose Image File which will allow you to create a jpg or png if that works better). Now, having said that I have heard that you can create an Illustrator file from vector lines. I am by now means an expert at it, but I believe that if your model is limited to vector lines (curves) you can export or save as an Illustrator file. This may be worth exploring. Source.