Moving Fastboot to Userspace

If you are looking to get this job done via Fastboot Commands, then Slots

I was able to fix this with fastboot --set-active=a followed immediately by fastboot flash boot and all the other partitions

fastboot change slot stack trace: Error: failed to set active slot: Error: {error:{code:1,cmd:fastboot --set-active=b},stderr: waiting for any device >

fastboot set active slot It may not flash TWRP as there is no active slot not bootable) If it is a slotted device in Fastboot run the command: fastboot getvar