I have always had trouble using my PicKit3 programmer getting it to connect. I bought an MPLAB Snap but when I try to connect I get the message
"You have entered an invalid value (null) for the Voltage Level on the Snap Power property page." Wherever that is.No idea what that means.
I don't think this would work but for the MX170s I program them in circuit via the 1455 using the PicProg gui. If I put the MX250 in a 170 board will it program.

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"It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all"