STM32F796NI Mbed debuging error

[JoanOG]

When I try to debug with the mbed studio I get the following error:

0001859:INFO:rom_table: [2]
0001860:INFO:rom_table: [3]
0001861:INFO:rom_table: [1]
0001863:INFO:rom_table:[1]
0001864:INFO:dwt:4 hardware watchpoints
0001868:INFO:fpb:8 hardware breakpoints, 1 literal comparators
0001876:CRITICAL:main:No cores were discovered!
Traceback (most recent call last):
File "c:\Users\JGonza12\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd_main_.py", line 402, in run
self.COMMANDSself._args.cmd
File "c:\Users\JGonza12\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd_main.py", line 746, in do_gdbserver
with session:
File "c:\Users\JGonza12\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\core\session.py", line 339, in enter
self.open()
File "c:\Users\JGonza12\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\core\session.py", line 457, in open
self._board.init()
File "c:\Users\JGonza12\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\board\board.py", line 85, in init
self.target.init()
File "c:\Users\JGonza12\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\core\soc_target.py", line 117, in init
seq.invoke()
File "c:\Users\JGonza12\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\utility\sequencer.py", line 208, in invoke
resultSequence = call()
File "c:\Users\JGonza12\AppData\Local\Mbed Studio\mbed-studio-tools\python\lib\site-packages\pyocd\coresight\coresight_target.py", line 214, in check_for_cores
raise exceptions.DebugError("No cores were discovered!")
pyocd.core.exceptions.DebugError: No cores were discovered!
"GDB server stopped unexpectedly with exit code 1"

Any idea?

[0xc0170]

please ask on the forum rather than docs (not related to the documentation).

Does pyocd work if you execute it directly? what version of pyocd or mbed studio is installed