Problem for perform a switch bank on STM32U385Rg

[Sixela]

Hello all,

I allow to send this message after a long attempt to perform a switch bank on my STM32U385RG.

This is part of my code:

/*--------------------------------------------------------*/
void OptionBytes_SwapBanks(void)
/*--------------------------------------------------------*/
{
    FLASH_OBProgramInitTypeDef OBInit;
    HAL_StatusTypeDef status;

    swo_printf("Current USERConfig: 0x%08lx\n", OBInit.USERConfig);

    __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_OPERR | FLASH_FLAG_PROGERR | FLASH_FLAG_WRPERR |
                             FLASH_FLAG_PGAERR | FLASH_FLAG_SIZERR | FLASH_FLAG_PGSERR |
                             FLASH_FLAG_OPTWERR);
    uint32_t optr = FLASH->OPTR;

    if (optr & FLASH_OPTR_DUALBANK)
       {
           swo_printf("Dual Bank is ENABLED\n");
       }
       else
       {
           swo_printf("Dual Bank is DISABLED\n");
       }

    if (optr & FLASH_OPTR_SWAP_BANK)
       {
    	   swo_printf("Swap Bank is ENABLED\n");
	OBInit.OptionType = OPTIONBYTE_USER;
        OBInit.USERType = OB_USER_SWAP_BANK;
        OBInit.USERConfig = OB_SWAP_BANK_DISABLE;
       }
       else
       {
    	   swo_printf("Swap Bank is DISABLED\n");
	OBInit.OptionType = OPTIONBYTE_USER;
    	OBInit.USERType = OB_USER_SWAP_BANK;;
    	OBInit.USERConfig = OB_SWAP_BANK_ENABLE;
       }
    status = HAL_FLASHEx_OBProgram(&OBInit);
    if (status != HAL_OK)
    {
        swo_printf("Error in programming Option Bytes: %ld\n", HAL_FLASH_GetError());
        HAL_FLASH_OB_Lock();
        HAL_FLASH_Lock();
        return;
    }
}

You can view some logs in attached files:

           

I can do the swap directly with STMCubeprogrammer but I cannot do it with code so i suppose that it's an error of configuration or code.