Hello, my friend. So, I tried your suggestion. The code failed after copy/pasting to the first slide. This time, the error was at line 1224. Another curious thing I found, a thing that may be causing me problems: Look at the second picture I've included here. I have to manually switch the Powerpoint object library back to 14.0, because 16.0 is missing. Could that be an issue?

error on copy paste CPAT5.JPG
error on copy paste CPAT6.JPG