Like Guy wrote, you can only have one file open with a specific name.

If you think you don't have book1.xls open already, then you and excel have a
problem.

Excel thinks you do.

Look under Window. Do you see book1.xls listed at the bottom--but you can't see
it on the screen?

If yes, try:
window|arrange|tiled
then resize/close that workbook

If no, try:
window|unhide
do you see it there?

If yes, then unhide it and close it.

=====
You may have book1.xls in your XLStart folder and it could be opening each time
you start excel (hidden or visible!).

close excel and use
windows start button|search
to find that book1.xls and move it (or delete it if you don't need it).

Then open excel and test it out.

Sentry11 wrote:
>
> A DOCUMENT WITH THE NAME \"BOOK1.XLS\" IS ALREADY OPENED. YOU CANNOT
> OPEN TWO DOCUMENTS WITH THE SAME NAME, EVEN IF THE DOCUMENT ARE IN
> DIFFERENT FOLDERS.
> TO OPEN THE SECOND DOCUMENT, EITHER CLOSE THE DOCUMENT THAT'S CURRENTLY
> OPEN, OR RENAME ONE OF THE DOCUMENTS.
>
> What's the root of the problem with this error message? Any help will
> be greatly appreciated.
>
> --
> Sentry11

--

Dave Peterson