Arm Mbed OS support forum

Debugging Fails - "Could not write register "PC"; remote failure reply "E01"

I’m just getting started with mbed on a Windows 10. I currently have a psoc6 dev board (identified as a “PSoC 6 Wi-FI BT Prototype Kit” I can compile and program, but I’m unable to enter into debug mode. After it programs the board, I get a the above Error Message "Could Not Write Register “PC”; Remote Failure Reply “E01”

Any ideas?

Hello Justin,

To check whether your Mbed enabled board can be debugged with Mbed Studio:

  • Go to
  • Roll down and in the left hand filter options check the last one
    Mbed Studio support: Debug.
  • Search for your board in the results.