They should run fine. You don't tell us what "completely wrong"means, but do check that automatic calculation is on:
ToolsOptionsCalculation tab, cheek Automatic

--
Kind regards,

Niek Otten
Microsoft MVP - Excel

"Pheasant Plucker®" wrote in message ...
| Hi there,
|
| We run a couple of spreadsheet 'templates' to extract data from a database
| and generate some reports.
|
| I updated Office Professional 2002XP to Office Professional 2003 last week
| to be fully compatible with our Tablet PC's in the field and when we tried
| to run the reports this week it would appear that the formulas for the gap &
| lapse analysis are completely wrong?
|
| Does this sound like the upgrade could have caused this type of problem?
|
| Are there any compatibility issues between Excel 2002 & 2003?
|
| --
| Thanks & regards,
| -pp-
|
|