Firmware download works, but debugging is not working

[DOwts.1]

Hello, 

I'm trying to debug an custom board with STM32L010C6 and STLINK V2. The firmware download seems to work fine, but the debugging is not working. The execution stops here:

0x1FF00220 4800   LDR   r0,[pc,#0] ; @0x1FF00224

I've already tried to break at SystemInit() and main(), but they are not reached.

It seems to be a problem in my board, because the same project works fine debugging on a Nucleo MCU, but I cannot yet figure out the problem.

I'm working with Keil uVision 5.31.0.0

¿Any ideas please?

Thank you

[DOwts.1 · Accepted solution]

I already figured out the problem, Boot0 was not properly connected to ground.