I have a data validation with a nested if statement.
=IF(R8="D18",D18_OP,IF(R8="D24",D24_OP,IF($R$8="D34",D34_OP)))
It works fine as long as I don't have D18 in R8. D18_OP named range = "Not Applicable". When D18 appears in R8 the drop down will not load with "Not Applicable" nor can I select...