An example named range has an address of "My.Sheet!$D$16". This is being marked as invalid by OfficeOpenXml.ExcelAddressBase.IsValid which does an Address.IndexOfAny on the character '.'
I'm not sure what this check is intending to filter out, but it's marking invalid my named range which should (I think) be legal
I'm not sure what this check is intending to filter out, but it's marking invalid my named range which should (I think) be legal