Since a long time Adobe illustrator CS, CS 2 has released, some times that there was a problem when some one try to save the illustrator file it returns a message and that says An unknown error has occurred(specially when used text). This is a Headache to graphic designers because they are unable to save files they designed hardly & to technicians because of there is no solution they might have to clean reinstall the whole operating system and Adobe software to resolve this issue.
I have not seen yet this error in illustrator CS3 & CS4. However there are questions in the internet it is in CS3 & CS4 also. There are more questions & inquiries regarding this issue in adobe web site and many of other references.
Since present there is not the solution made by adobe. Others also haven’t been identified the problem yet. They are advising to resolve by installing updates, installing distiller, deleting configuration files & etc…
Problem is, anyhow deleted the content of a folder called “CMaps” in
C:\Program Files\Common Files\Adobe\Fonts\Reqrd
llustrator Complete uninstallation & reinstallation is also not success.
You can easily recover this doing the following– find a working illustrator CS or CS 2 installed PC & see the both CMaps folders diference.you will see can’t save PC’s CMaps folder is empty or too small content. Just copy the content from working PC CMaps to problematic PC, problem will resolve
Because of I haven’t been faced yet this error in illustrator CS3 & CS4, success in only CS & Cs2.
I think this will more helpful you