I would guess that one key is numeric and one key is text (but looks like
numbers).
It's not enough to change formats--you have to change values.
Debra Dalgleish has some troubleshooting techniques at:
http://www.contextures.com/xlFunctions02.html#Trouble
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Dave Peterson
Pete_UK - 19 Jan 2006 12:46 GMT
I came across a quick tip the other day that you might like to try.
Highlight the column of IDs that you suspect might be text, then Data |
Text to Column then click Finish - this will convert them to numerics
(if they comprise only numbers). Only takes a few seconds.
Hope this helps.
Pete