I forgot to mention that the 'WorksheetExists' function was created by
Chip Pearson ... code below, stored in Module:

Function WorksheetExists(SheetName As Variant, _
Optional WhichBook As Workbook) As Boolean
'from Chip Pearson
Dim WB As Workbook
Set WB = IIf(WhichBook Is Nothing, ThisWorkbook, WhichBook)
On Error Resume Next
WorksheetExists = CBool(Len(WB.Worksheets(SheetName).Name) 0)
End Function