STM32WB55CGU6 full erase

[CLIN.4]

I accidently put the FUS and BLE firmware in the wrong starting address. The chip has 1M flash. When I loaded the firmware, I was following the 512K flash memory location. Now I cannot perform full memory erase as some areas (from index 243 - 245, total of 255) are locked. Is there a way to erase these areas?

Thanks,

Charles

[CLIN.4]

I am tried to load the FUS firmware without erase the flash memory. It keeps showing me "The file FUS_Operator.bin does not exist, please check the file's path". What is this file, I could not find this binary file anywhere. And the messages are looping while it says "file upload completed". Anyone could help me out?

16:14:45 : Firmware Upgrade process started ...
16:14:45 : Memory Programming ...
16:14:45 : Opening and parsing file: FUS_Operator.bin
16:14:45 : The file FUS_Operator.bin does not exist, please check the file's path
16:14:45 : Failed to download FUS operator!
16:14:45 : Download firmware image at address 0x80ec000 ...
16:14:45 : Memory Programming ...
16:14:45 : Opening and parsing file: stm32wb5x_FUS_fw.bin
16:14:45 : File : stm32wb5x_FUS_fw.bin
16:14:45 : Size : 24492 Bytes
16:14:45 : Address : 0x080EC000 
16:14:45 : Erasing memory corresponding to segment 0:
16:14:45 : Erasing internal memory sectors [236 241]
16:14:45 : Download in Progress:
16:14:45 : File download complete
16:14:45 : Time elapsed during download operation: 00:00:00.958
16:14:45 : Firmware Upgrade process started ...