Debugging failure almost all Nucleo board - Solution is here

Since Mbed, specifically MbedStudio, does not support OpenOCD but rather prefers pyOCD, I’m afraid this info won’t be included into the official Mbed documentation. To notify as many users as possible you can try to post this info also in another related and popular threads. For example the following one has been viewed more than 2600 times:

https://forums.mbed.com/t/mbed-studio-cant-debug