I am not able to connect to my TWR-K21F120M kit. Previously, I have used it from Kintetis Desing Studio with the built in PNE interface but all of a sudden this does not show pop-up as an option when pressing the Debug Button.
Here, only OpenOCD and Segger are available.
Trying to use J-trace also gives me an error message, and when trying to connect with J-Flash I get the error message "Kinetis (connect): Communication error while accessing AHB-AP."
How can I connect to my TWR-K21F120M kit again?