After my icd3 emulator has been used on MPLAB x, I can’t find the driver ID when I use MPLAB ide 8, but the emulator can be connected, but it can’t be connected to the chip. Then I https://www.microchip.com/forums/m/tm.aspx?m=827926& ; The answer is found in P = 1
resolvent:
mplab ide 8
Programmer –> Settings –> Configuration Tab –> Manual Download –> ICD3FW_ 012643.jam
Then wait for the firmware upgrade to succeed