What causes this error?

[jda]

Hi Ruslan,

What does this error/message mean?

Database Engine Error: 365826
Database Engine Error: File does not exist.

I have a user who reports it, and thinks it's a permission error. Is 
that right? What will cause this exception to be thrown? Is it only 
permissions? If so, I will change the wording to something more 
helpful, like "You need read/write permission to use this file" or 
something like that. If the exception is thrown for other reasons, 
too, of course I can't do that.

Jon