Sorry for rephrasing an earlier question, but a tough deadline is
aproaching.........

In a very large workbook, the Autofiltertop10 function wont work on
several columns (works on some, not others). After setting the criteria
in the usual way, nothing happens. When I go back into the filter
dropdown, the filter shows it's still set to "all".

There are no gaps or spaces,no errors, and the column is formatted as a
number. The data is flat, no formula involved.


Help !