I (unintentionally) tried opening a Workbook from two folders with the same name (which you can't do in Excel) using a script like this:  Local $oExcel = _Excel_Open() Local $oBook1 = _Excel_BookOpen($oExcel, "C:\1\Book.xlsx") If @error then Exit ConsoleWrite("Failed to open book 1!" & @CRLF) Local $oBook2 = _Excel_BookOpen($oExcel, "C:\2\Book.xlsx") If @error then Exit ConsoleWrite("Failed to open book 2!" & @CRLF) I was surprised to see that