Error 11

[John Long]

E: 6/6/2005 8:40:34 AM: Error 11. Error reading a file
E: 6/6/2005 8:40:34 AM: An error occured. Step #1 (Pack Files).

What can I do to fix this error?

Thanks

[Oleg]

This means that program has opened but couldn't read a file by some reason (for example bad disk).
When was this error occurred? Unfortunately I can't simulate this situation.