Oops - Stupid mistake.
I thought i had filtered put all of the nulls and blank entries
from the source table, but I hadn't. Of course the match doesn't work
on a blank entry.
the user-defined aggregate functions do work properly, and as
expected. Sorry to trouble everyone.
--
Karl DeBisschop <kdebisschop@spaceheater.infoplease.com>
617.832.0332 (Fax: 617.956.2696)
Information Please - your source for FREE online reference
http://www.infoplease.com - Your Ultimate Fact Finder
http://kids.infoplease.com - The Great Homework Helper