about PARAMETER_FILE=sim.var autosave file

Hello, everyone, I am testing my interface. I have used the function of setting the work origin(G5x offset : "G10 L20 P0..."). I have a problem, I start "linuxcnc config.ini" and set "G10 L20 P0...", but not saved in sim.var. Then I compared them with /usr/bin/axis and /usr/bin/gscreen ..,no relevant information was found. What can I do to save this file automatically?
Thank you!!!
Thank you!!!
Thank you!!!

the VAR setting only workes in a RT invirerment on a real mashine
why is there SIM.var in use
is it a Simulation setup

sim.var just a example,it could be another name.
I use start linuxcnc ../linuxcnc/config/axis.ini or gscreem.ini the sim.var can be autosave, so it doesn't matter if it's real-time/real machine or not.

the var file in the SIM folder is regenerated at every start of any config so it is not to be used

look in INI and set a name of your use
[RS274NGC]
PARAMETER_FILE = myvar_name.var

then you can see the effect

Thank you for your reply, I have solved the problem, the reason is the folder permissions, resulting in the automatic creation of var file without permission at startup, this is my own problem.