Hannes,
Is it listed under the Windows menu when it is not visible?
If it is, may be it is open but it's positioned outside of the Excel window,
but returns once you arrange the windows.

NickHK

"Hannes" wrote in message
...
Hi everyone,

I have a small problem with a workbook that I regularly send out to some
of
the people at my work. The workbook is not that complicated. Just a Pivot
table and a Pivot graph with a few formating macros.

Some times they cant seem to open the workbook. When they open it excel
appeares blank and with no workbook open. I´ve found a way around this.
When
you start a new workbook in the same window and select "window - compare
side
bys side" the hidden workbook appeares.

Has anyone ever seen anything like this?