MPLAB ICE 4 In-Circuit Emulator User's Guide

5.5.1 Requirements for Trace

The following is required to use trace for PIC 8- and 16-bit devices:

MPLAB X IDE.
MPLAB XC8 C compiler or MPLAB XC16 C compiler.
A target board with debug and trace connections to a device that supports trace.
PIC MCUs - ICSP Adapter Board OR a target board with a connector to the high-speed 40-pin ribbon cable.

The following are limitations of trace:

For 8- and 16-bit devices, in-line assembly code (assembly code within C code) cannot be traced.
For additional limitations by device, see Help>Help Contents>Hardware Tool Reference>Limitations.
For additional limitations by trace type, see Trace Methods.

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