Hey ​@ma926, how’s it going?  Great to have you here! 

It looks like your Metis device didn’t respond in time during one of the flashing stages. Maybe if we try these troubleshooting tips as a first step, we can see where we’re at after that:

 Let’s start by confirming the device is in a good state before flashing:

source venv/bin/activate
axdevice

This lists the connected Metis device(s) and its status. You should see an output something like:

Device 0: metis-0:1:0 4GiB pcie flver=1.2.0 bcver=1.0 ...

Here’s what we’re looking for:

• flver: the currently installed firmware version

• bcver: the board controller version — this has to be at least 1.0 to support flashing the board controller. It probably is, but it’s worth double checking.

And then:

axdevice --refresh

Which reloads the firmware and resets PCIe enumeration, and can be a good way to fix unresponsive states before flashing. After that, if you try reflashing again, let’s see where we’re at  Keep me posted!