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Hi,
Can you not do what is required with standard validation, using the Custom option and the formula
=COUNTIF($A:$B,A1)<=1
?
Hi,
Can you not do what is required with standard validation, using the Custom option and the formula
=COUNTIF($A:$B,A1)<=1
?
Rule 1: Never merge cells
Rule 2: See rule 1
"Tomorrow I'm going to be famous. All I need is a tennis racket and a hat".
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