Cannot flash or debug NUCLEO-WL55JC1

Hi, I just ordered a NUCLEO-WL55JC1 but I can’t manage to flash or debug it using Mbed Studio 1.4.4.

When I flash with Mbed Studio, it indicates that everything was successful and the program is running.
In fact, the program is not flashed properly (e.g. blinky example does not make the LED blink), but the flash seems erased or corrupted.

However, flashing using the mass-storage method works (i.e. blinky example makes the LED blink), but this is very uncomfortable and debugging still does not work.

I boiled the problem down to pyocd and tried to seek help there.
See my comment on this issue including logs:

Is there anything else I can try?
For instance, is there a Mbed Studio / pyocd version that is known to work with the NUCLEO-WL55JC1?

Thank you

I see you are getting some help on pyOCD issue. It’s the best place to discuss the problem there as it is most likely a bug somewhere there.

@jeromecoutant is there known issue with this board?

Thanks for you reply!

I will keep you updated here