I coded my own UPC code maker that builds a UPC on a sheet and then the code is copied and pasted in the target cell, but it randomly fails during the cut and paste. I know the code works as it runs flawlessly on my Surface running the same version of excel as my work laptop. I am thinking it might be a timing issue where the copy is not completing before the paste so there is nothing there to paste. I am thinking I might have to put in some sort of delay in after the copy to allow the computer to finish it before the call to paste. I guess I am wondering if a short loop after the copy might work or maybe I am missing another possible cause?