Hello,
i have a FRDM-KL46Z board and want to debug an application with MCUXpreso but the OpenSDA interface from the board is not visible in MCUXpresso.
James,
if you are using Windows 10, you might be affected that the host OS overwrites the debug firmware on the board.
see Recovering OpenSDA Boards with Windows 10 | MCU on Eclipse and especially Bricking and Recovering OpenSDA Boards in Windows 8 and 10 | MCU on Eclipse
I hope this helps,
Erich