It seems that putting " #AutoIt3Wrapper_UseX64=n" at the start of my scrpits doesn't fix the ExcelBookClose problems. I can open and read Excel files fine, but if I try to close them, they don't close. Furthermore, when I try to open a third Excel workbook, it doesn't even open. I am not a programmer, so a lot of this stuff is over my head. But, I have developed several scripts to evaluate several different excel file data and they worked fine until I was upgraded to a 64-bit machine with