I found this to solve my problem (boot_lock) , not sure what that option byte does or if i can program it via Stm32Cube IDEhttps://community.st.com/t5/stm32-mcus-embedded-software/debugger-stops-after-hal-tim-base-start-it/td-p/80750

I have similar problem with my code that used to work on 431KB nucleo board, but fails on my prototype with 431RB MCU. Debugger does not step over HAL_TIM_Base_Start_IT(&htim1);   static void MX_TIM1_Init(void) { /* USER CODE BEGIN TIM1_Init 0 */ ...

Hello everyone,I have similar problem with Nucleo 32 G431KB. I just opened brand new package , tried to run a sample program and was forced to update firmware in ST Link V3. Seems like update failed and the device is basically not upgradeable. Unable...