Things to try: Save As the File to rename it.
Save the file in a different version of Adobe Illustrator.
Create a new file and paste contents of broken file.
This video will show you how to save a file in Adobe Illustrator when you get the error message "File is already in Use" or "Can't save illustration". This common problem can be frustrating so remember to make sure that the file you are working with is not open with any other programs. You can also try saving the file in a different version of Illustrator. It can be a corrupt file, and needs to be salvaged. Sometimes the fonts can become corrupt as well.
Thanks!
Watch video "Can't Save Illustration" - Adobe Illustrator Problem With Saving Files [Solved] online without registration, duration hours minute second in high quality. This video was added by user MrJayBusch 16 October 2012, don't forget to share it with your friends and acquaintances, it has been viewed on our site 76,343 once and liked it 70 people.