I've got a multiboot system with a different Office in each OS.
The main OS has Office 2003.
And I created a workbook with lots of XIRR functions using Excel 2003.

Recently, I've had a need to boot to the system that has Office XP.
And go back and forth between the two OS.
All of a sudden, I started getting a message about updating a Link when I
opened the workbook under Office XP.
So I booted to the OS that has Office 2003.
Sure 'nuf I got the same message.
The link was to ATPVBAEN.XLA, which seemed odd, as I've not seen that link
before, and I do use XIRR a lot.

I created a new workbook, added an XIRR, and no Link was added.

So there's sumptin about going back and forth between Excel versions seems
to cause a problem.

Is this known behavior?

Is there a workaround?

I managed to restore things without the Link by fooling around, but there
was no method in my madness, so I'm nor quite sure what I did to kerect the
situation.