Hello,

I have a very big workbook containing thousands of formulas and
outlines as well as self-programmed functions (in an AddIn). Now I
recognized that Excel recalculates nearly my complete workbook on
closing/opening outlines. So I took a closer look at it and found that
Excel recalculates all those formulas again which are located outside
the outline - but which use cells in side that outline.
For example if formula in cell A1 contains "=B5*A2" and then I
open/close an outline so that B5 becomes visible/invisible then
formula in A1 is recalculated.
But this does not happen in any Excel-version before Excel 2003.
So I have two questions:

1. Is this a bug or a feature of Excel2003?
2. What can I do against it so that I still can use my workbook?

Thanks for your trouble in advance.

Kind regards,
Dirk