Error (513)

[Me]

When I attempt to save an altered Visio drawing under a different file name
(same file type and in the same directory that the original file is in), I am
receiving the following error message:

"An error (513) occurred during the action Save As. Visio is unable to
write to the directory or disk drive."

However, I am able to save the file in another directory and then copy it
the the directory that I want it in; I just cannot save it directly without
getting the 513 error.

What is an error 513, and how do I prevent it from coming up again?

I am using Visio 2000 on a Windows XP machine.

Thanks.