Illustrator .ai file get corrupted. “The file is damaged and could not be repaired.” Yesterday I saw such message, when I was trying to open my .ai file.

You may want to contact Adobe tech support for help with this.

Hi,

Try Illustrator Repair Toolbox how to open corrupted Illustrator documents

Recover AI file : The efficiency of Adobe Illustrator file restoration is determined by the experience of community. Please note it is not open source to make impossible the changes of its artificial intelligence and data restoration algorithms. In the same time, the support for GNU or GPL is absent.

Try this : https://www.repairtoolbox.com/illustratorrepair.html

Hope this helps.