I created some huge objects in Adobe Illustator couple of days ago. Today I've added some valuable changes in it. But only two hours ago at opening one of the .ai files I got...An unknown error has occurred. When I was searching .ai file repair software, I found nothing. I applied some manuals to get this message rid of, but nothing helped me at all.
Requires Acrobat (not just the Reader).
Works on (and was tested in) Illustrator version 10 and all CS versions.
>Open the corrupt file in Acrobat.
>Take the arrow tool.
>Click on any element or text in the document.
>Just move the object by hitting one of the directional arrows on your keyboard.
>Open the file in Illustrator.
>It will say 'this file has been modified outside of Illustrator' or something to that effect. it will ask if you want to keep changes.
>Say 'Yes' (or OK)
Your file will open virtually intact!
More various resources that I found from Google and Yahoo https://helpx.adobe.com/illustrator/using/crash-file-data-recovery.html https://download.cnet.com/Recuva/3000-2242_4-10753287.html https://onlinefile.repair/en/illustrator.html
This has worked when nothing else has... believe me it is painful to have to recreate a corrupt file....
It much better to make what you like and what you know as yourself