Then you can't open .ai file via any method apply more powerful solutions as how to repair illustrator file This one blog is very interesting, it is related your issue - http://smallbusiness.chron.com/recover-work-illustrator-39270.html It is the source of guide…
I'm using Adobe Illustrator CC 2017.0.2. Many times I had some issues. Couple of days ago .ai file didn't opened. I checked other files, they were fine. How to be with that file?