After your device reboots from the standard unlock, boot it back into fastboot mode and run fastboot flashing unlock_critical . Confirm the unlock on your device.
openocd -f interface/stlink.cfg -f target/stm32f1x.cfg -c "init; reset halt; stm32f1x unlock 0; reset halt; exit" Use code with caution. After your device reboots from the standard unlock,
Some partitions are more protected than others. For example, you may be able to flash the boot partition after a standard unlock but not the bootloader partition. If you're having trouble with a specific partition, try unlocking critical partitions using the fastboot flashing unlock_critical command, as that is designed to grant access to these low-level areas [13†L10-L11]. Some partitions are more protected than others
: The physical state of the bootloader chip. If the flag reads LOCKED , the processor rejects arbitrary write instructions via Fastboot, prompting the remote failure syntax. Step-by-Step Resolution Guide : The physical state of the bootloader chip