Hi,
When a user inputs data (numbers) into cells in column D, they should
include a three digit prefix before the numbers. I would like a message box
to pop up if they fail to do this and delete what they have put in the cell
thus forcing them to try again. For example 09/123 would be rejected but
SUM09/123 would be ok.

Thanks in advance.
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Traa Dy Liooar

Jock