zerog
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Restrict input to only one value per row for a specified range
How would I restrict input to only one value per row for the range D12:K12. The range for the second row would be D13:K13 and so on. There should only be one value in the specified range for each row. The value is any number between 0-99999
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=COUNT($D12:$K12)<2
Thanks
Rob H