I have a workbook that has recently increased from 5meg to 30 meg. There are
no pivot tables -- only a couple small macros that involve a few lines of
vba. What could have caused the jumped.. and what can I do to fix it?

Just guesses...

The last used cell on each worksheet is way past where you think it should be.
See Debra Dalgleish's site to reset this last used cell.

http://www.contextures.com/xlfaqApp.html#Unused

Any chance you have objects (pictures/buttons/textboxes) in your workbook?

Sometimes pictures get duplicated by error.

Mark wrote:

I have a workbook that has recently increased from 5meg to 30 meg. There are
no pivot tables -- only a couple small macros that involve a few lines of
vba. What could have caused the jumped.. and what can I do to fix it?

--

Dave Peterson