4.3.2.5 Resources Used by the Debugger
For some devices, device resources must be used for debug. For a complete list of resources used by the debugger for your device, in MPLAB X IDE select Help > Release Notes. In addition to a section for “Release Notes/Readmes,” there is a section for “Reserved Resources.” Select either “Reserved Resources by Device Family and Tool” or “Reserved Resources by Device for All Tools.”