QUOTE(WillieK @ Dec 24 2005, 12:42 PM)

When the last row is used up a new sheet has to be started. This is Ok but the results form multiple sheets need to be manually tallied up. Also in order to bring up a new sheet the program has to be closed and restarted.
I hope I don't misunderstand what you answered. You did not really answer the questions about the size.
Once you use last row on a sheet, there really is no more. Some 65 thousand rows? Or have you limited the scrolling area to some smaller number? Or have you limited your formulas to a fixed number of rows?
You should be able to add a new sheet without restarting Excel. Just use the menu Insert-Worksheet.
And if you indeed have to have results from multiple sheets, that, too can be done with no manual effort, by specifying sheet names in front of ranges you're adding up.
If we're getting nowhere, if we're misunderstanding, there is a way to email stuff here. Mail me the spreadsheet and I'm willing to take a look.