3 Replies Latest reply on Feb 16, 2010 8:52 AM by Harron K. Appleman

    "File is in an unknown format and cannot be opened"

    Brent Schooley

      I am attempting to open an .AI file that was sent to me from a colleague using the Mac version of Illustrator CS3.  I am trying to open the file on the Windows trial of Illustrator CS4.  I have been able to open files from a different colleague using Mac CS3 but when I try to open this file I get the error "File {filename} is in an unknown format and cannot be opened."  Does anyone have any idea what could cause this?

       

      Thanks,

      Brent