I have a CM4 on a wondershare 4g/5g board, with a 19.xx.xx something snapshot build currently and I am trying to upgrade to a 22.xx.xx build.
When I issue any of the below commands:
sysupgrade -n /tmp/RaspberryPi-CM4-ext4.img
sysupgrade -F /tmp/RaspberryPi-CM4-ext4.img
I get this error:
Cannot find '/overlay/upper/etc', required for '-c'
This mounted on a 30' pole, so I am hoping there is a way for me not to have to climb it.