"DavidObeid" wrote:
It doesn't seem to recognise the blank cells as blanks?

Sorry, think I missed the significance of this line in your orig. post
.. 2 columns (that are each the result of different formulas).

Glad to see you've got other insights which worked for you since.
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Rgds
Max
xl 97
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Singapore, GMT+8
xdemechanik
http://savefile.com/projects/236895
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