(Sorry...sent my first post too early.)
Excel 2003 help on "limitations" reports the following:
PivotTable reports on a sheet-->Limited by available memory
Unique items per field-->32,500
Row or column fields in a PivotTable report-->Limited by available memory
Page fields in a PivotTable report-->256 (may be limited by available
memory)
Data fields in a PivotTable report-->256
Calculated item formulas in a PivotTable report-->Limited by available
memory
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Anne Troy
www.OfficeArticles.com