I discovered the problem with IsNumber by accident and found the cause thanks to the Community. It causes hard-to-find errors. Can the <IsNumber> function be modified in a subsequent version?
see Erel's alernative function Dec 25, 2016
Sub TestNumber(s As String) As Boolean
Return IsNumber(s) And Regex.IsMatch("[\d\.]+", s)
End Sub
see Erel's alernative function Dec 25, 2016
Sub TestNumber(s As String) As Boolean
Return IsNumber(s) And Regex.IsMatch("[\d\.]+", s)
End Sub