So what does your paramter
For ipecmd.exe the -w parameter sets the voltage supplied by the programmer, -w3.3 for example.
On my machine I have MPLABX v5.2, there's a docs folder in which there's a file called Readme for IPECMD.htm which lists all the options and a whole bunch of examples.

Here's what my PICKit3 at 3.3V entry in the programmers list looks like: -tPPK3 -p$target-device$ -f$hex-filename$ -e -m -w3.3 -OL