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I am getting the following error when trying to flash Failed to resume target process. Not allowed to access registers while running

Question asked by David Potter on May 3, 2017
Latest reply on Sep 27, 2017 by Douglas Triman

Using a custom board, that has been flashed before. Processor, MK20FX512xxx12.  I tried the following command in J-Link Commander, "h", to halt the processor. Doesn't help.

Codewarrior 10.7

I have no compile or PE generate code errors.

Just can't flash the MCU