Failed -remote 39-flashing Lock Flag Is Locked. Please Unlock It First 39-- 〈Best × SERIES〉

mw 0x<address> 0x12345678 # unlock command (address varies) protect off all erase <start> <end> Or (for SPI/NOR flash):

STM32_Programmer_CLI -c port=SWD -ob Unlock Or from the GUI: go to → disable read/write protection. Option B – Unlock from bootloader/U-Boot In U-Boot (common on routers/dev boards): or embedded system (possibly a router

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). or industrial equipment).