LOCK UP State STM32H7S3L8 NUCELO 144

[MohnishMitra]

So I have been using NUCLEO 144 H7S3L8 board for developing an application. The problem I encounter is while trying to upload the code using the on board usb and ST-LINK, the Microcontroller goes into LOCK UP state. All my settings are default for RCC and PWR. I am using ADC0 and DMA. Also, I am using internal clock and flash since I am new and don't know how to set up external flash.

If anyone help me please contact here. I will also send the source files and Screenshot of the errors if needed.

[MohnishMitra]

* I am using BSP Virtual COM port for sending values to laptop.

[TDK]

> the Microcontroller goes into LOCK UP state

What does this mean in particular? Does the program upload? Do you get error messages? Can you connect with STM32CubeProgrammer when chip is "locked up"?

How do you know this isn't just due to a bug in your program?