If Intersect(Target, Range("D4:D33", "K4:K33", "R4:R33")) Is Nothing Or Trim(Target.Value) = "" Then Exit Sub
Private Sub Workbook_SheetChange(ByVal Sh As Object, ByVal Target As Range)
ElseIf target.value >0 and fncSchnapszahl(Cells(4, Target.Column + 1)) Then