Thank you Piotr, I seem to be able to use fasterrcnn now with pytorch 1.9.0.dev20210513.  Was this a recent bug? I tried to look on github issues for something related, but I didn’t see anything.
Also, while you are online, let me say thanks heaps for you and your team’s support work! Your help has saved my butt so many times (although this is my first time posting in the forum).