This one is a little different from the usual "Can't open the illustration" error of late. Here's the setup:
Opening a file of 'saved paths' in Illustrator 9 running under Classic in OS X 10.2.8. The saved paths are from Photoshop 6 running under Classic in OS X 10.2.8. We are also using Suitcase X1 to manage our fonts.
Copy the saved paths into a new doent and reduce the image to fit a 3" X 3" window. Fill paths white, stroke paths black. Add text. Save as an AI.9.02 EPS file with extension.
Close file. Quit Illustrator. Restart Illustrator. ...