Tim Robson
We believe that sandboxing is denying us the right to create an AAF file in the output location. As the forum post says the normal fix for that is to drag or browse to the output location again. If you are running Sonoma the sandboxing on that is even more aggressive than previous versions of the OS. It also has a strange behaviour where you can get different results by dragging or browsing for locations so it’s worth trying both.