I am trying to debug a demo gpio project gpio+twrk60f120m to my board using MK60FN1M0VLQ12. But when I debug it, it shows up a windows "Device is secure. Erase to unsecure?". After I hit "Yes", it shows "No source available for "0xFFFFFFFE (0xFFFFFFFE)() " and disassembly at 0xFFFFFFFE " Unable to retrieve disassembly data from backend.".
But I tried to create a new gpio project using Processor Expert and it works.
Any ideas about this?