I get this error when I try to upload code to a FRDM-K22.
An internal error occurred during: "Launching demo_Debug_OpenOCD".
It seems to me that you have done an update with newer GNU ARM Eclipse debug plugins? If so, there is a know issue with these plugins affecting OpenOCD and Segger J-Link.
See this thread Unable to Debug after KDS Update which has a workaround attached to it.
I hope this helps,
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