"Failed to execute MI command ...error from the debuggers end"

[Harumoto_2]

i'm using Stm-Cube ide version 1.15.0 and getting this error when trying to flash the firmware.

 

[TDK]

Can you connect using the standalone STM32CubeProgrammer program?

What does test.elf do? If it goes into low power modes, or re-initialized SWD pins, or erases FLASH, this will cause issues with debug.

Is this a known good ST board or custom hardware?

[Harumoto_2]

it is a nucleo board-L452RET6

[TDK]

And the answers to the other questions?