It sounds like you’re encountering an error message from a device, software tool, or embedded system (possibly a router, network switch, microcontroller programmer, or industrial equipment).
stm32f1x unlock 0 During boot, interrupt into CFE and run: It sounds like you’re encountering an error message
Failed - Remote 39: Flashing lock flag is locked. Please unlock it first. Fix in CFE: or embedded system (possibly a router
flash protect 0 0 last off Or: