I’ve made some progress, but have run into a new problem: I’m at the “51 Steps, Linearize the .Quad” stage. When I attempt to drag and drop the .quad file and the .txt file jointly into QRT-Linearize-Quad the notepad opens and I get an error message to the effect that those two files cannot be found. I can open each of them in the notepad by themselves – that is, one a time, but the second overwrites the first, and, having done that, nothing else happens. I have tried Copy & Paste which doesn’t work. Do you have a suggestion?