__main__:STLink error (9): Get IDCODE error

[athreyaspec]

I am getting this error when trying to run mbed-os-snippet-Serial STDOUT on DISCOH747I (which is STlink V3).

Update Image: BUILD/DISCO_H747I/ARMC6/mbed-os-snippet-Serial_STDOUT_update.bin Image: BUILD/DISCO_H747I/ARMC6/mbed-os-snippet-Serial_STDOUT.bin 0002683:CRITICAL:main:STLink error (9): Get IDCODE error Traceback (most recent call last): File "/Library/Application Support/Mbed Studio/mbed-studio-tools/python/lib/python3.7/site-packages/pyocd/main.py", line 402, in run self._COMMANDSself._args.cmd File "/Library/Application Support/Mbed Studio/mbed-studio-tools/python/lib/python3.7/site-packages/pyocd/main.py", line 572, in do_flash with session: File "/Library/Application Support/Mbed Studio/mbed-studio-tools/python/lib/python3.7/site-packages/pyocd/core/session.py", line 339, in enter self.open() File "/Library/Application Support/Mbed Studio/mbed-studio-tools/python/lib/python3.7/site-packages/pyocd/core/session.py", line 457, in open self._board.init() File "/Library/Application Support/Mbed Studio/mbed-studio-tools/python/lib/python3.7/site-packages/pyocd/board/board.py", line 85, in init self.target.init() File "/Library/Application Support/Mbed Studio/mbed-studio-tools/python/lib/python3.7/site-packages/pyocd/core/soc_target.py", line 117, in init seq.invoke() File "/Library/Application Support/Mbed Studio/mbed-studio-tools/python/lib/python3.7/site-packages/pyocd/utility/sequencer.py", line 213, in invoke resultSequence.invoke() File "/Library/Application Support/Mbed Studio/mbed-studio-tools/python/lib/python3.7/site-packages/pyocd/utility/sequencer.py", line 208, in invoke resultSequence = call() File "/Library/Application Support/Mbed Studio/mbed-studio-tools/python/lib/python3.7/site-packages/pyocd/coresight/dap.py", line 376, in _connect connector.connect(self._protocol) File "/Library/Application Support/Mbed Studio/mbed-studio-tools/python/lib/python3.7/site-packages/pyocd/coresight/dap.py", line 163, in connect self._connect_probe(protocol) File "/Library/Application Support/Mbed Studio/mbed-studio-tools/python/lib/python3.7/site-packages/pyocd/coresight/dap.py", line 183, in _connect_probe self._probe.connect(protocol) File "/Library/Application Support/Mbed Studio/mbed-studio-tools/python/lib/python3.7/site-packages/pyocd/probe/stlink_probe.py", line 136, in connect self._link.enter_debug(STLink.Protocol.SWD) File "/Library/Application Support/Mbed Studio/mbed-studio-tools/python/lib/python3.7/site-packages/pyocd/probe/stlink/stlink.py", line 267, in enter_debug self._check_status(response) File "/Library/Application Support/Mbed Studio/mbed-studio-tools/python/lib/python3.7/site-packages/pyocd/probe/stlink/stlink.py", line 305, in _check_status raise exceptions.ProbeError(error_message) pyocd.core.exceptions.ProbeError: STLink error (9): Get IDCODE error

Have anyone came across this ??