It's probably toast, but try this:
From Illustrator, try open recent file.
Create a new file and try to place the corrupt file into it.
Try to open it in Acrobat.
Change the extension to .pdf and try to open it in Acrobat and Illustrator.
here's a link you can try:
Thank you for your answer.
Unfortunately, in all cases the computer says that the file is unavalaible. And I could not try the trick on the webpage you suggested, since I could not locate the proper file.
Thank you anyway.
I think Luke is right. It's toast. The size on disk is listed as only a single block of space so that only a very limited amount of information could be stored there.
Where is (was) the file located? On your hard disk?
Do you have any backup software running that moves files around?
Have you checked for viruses?
And please tell us all the details about your system setup.