Thanks for providing all the information to my questions!
I was able to successfully reproduce your error here. It looks like the Arduino IDE add-on for the Orangutans and 3pi Robot does not work with latest Arduino IDE version (2.0.0), specifically the “Pololu USB AVR Programmer” entry. I was able to successfully upload a sketch onto the 3pi robot using the Pololu USB AVR Programmer v2 and Arduino IDE 2.0.0 by setting the “Atmel STK500 development board” as the programmer entry (under the Tools menu in the IDE) and selecting the “Upload Using Programmer” option (under the Sketch menu or Ctrl+Shift+U).
Please try the “Upload Using Programmer” option and let us know if you have any more issues. We plan to update the instructions in the “Programming Orangutans and the 3pi Robot from the Arduino Environment” guide soon.
- Amanda