Ha. So I changed nothing, rebooted the PC, erased and reset the Duet and ta-da, SAM-BA is running. Maybe it just needed 20 erases to work? Thanks again for the quick responses.

Thanks for the fast response! Yes, have tried all these things including installing/re-installing every available driver (random troubleshooting at this point)

There's nothing connected to the Duet except the USB cable and yes, when connected in Windows I see the Bossa program ports. If I press erase then reset, it will drop and reappear in Device Manager. I get the same result with two different USB cables.

I'm building a new printer and I'm having no success installing firmware on the Duet Ethernet. M997 only resulted in read/write errors and I could never get the ethernet connection to work; M552 would change the configured IP but actual IP stayed 0.0.0.0.

Fast forward, I tried to erase the board and flash via Bossa with no success. I tried on both a Mac and a PC; each computer returns a "Auto scan for device failed" error. I even tried to specify the port on both the PC and Mac with the -p argument (COM3 and cu.usbmodem1421 respectively) with no luck.

Following other threads in this forum I downloaded SAM-BA and gave it a try this morning, but I receive the following error after pressing 'Connect'