My new batch, MB1136-F446RE-C05, A240300248 appears to not program via USB using the Arduino IDE ver 2.3.4. (Old batch -C04, loads the same program perfectly, using the same everything.) Tried three from the -C05 batch and had the same issue.
I get the error message:
"NODE_F446RE not found. Please ensure the device is correctly connected.
Failed uploading: uploading error: exit status 7"
The IDE apparently connects to the board perfectly. The board lights up correctly and runs its version of blinky, just as it should. The IDE panel shows it is connected. It even answers "Get Board Info" with the proper response. It just fails to upload any program.
Tried different ports, different cables, different computers, with identical results.

Any suggestions?
Thanks in advance,
Bill D.