System Workbench for STM32

Hi,

Are you trying the debug config in shareable mode stlink ?
Try in normal mode first.

And the "Connect under reset" mode, is it the same ?

Yes, it seems gdb can't start.

Can you check there is no other gdb or openocd running.

Also, can you try a simple project for the nucleo board mcu, is it working fine ?

Rgds,
Laurent