Hi
OpenOCD looks to need the CMSIS-DAP debugger installed - I don't know whether this works with KDS since usually the P&E one tends to be used.
Rowley Crossworks does use CMSIS-DAP for debugging and, when working with this IDE, I load the attached debugger instead. (Again not necessarily the latest version but has been used successfully).
Regards
Mark
Kinetis: µTasker Kinetis support
K64: µTasker Kinetis FRDM-K64F support / µTasker Kinetis TWR-K64F120M support
For the complete "out-of-the-box" Kinetis experience and faster time to market