Thank you Tesla,just to clarify, I am trying to connect to the board via USB cable.Parity even doesn't make a difference and I struggle with finding out how to set BOOT0 on the Portenta H7 board. I came across this post:https://community.st.com/s/que...
Further to the above, I managed to get rid of that error message by running the Cube CLI as super user:normal user:[ulf@ulf-manj bin]$ ./STM32_Programmer_CLI --connect port=ttyACM0 P=NONE br=9600
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