How to hard-reset machine position in sim.axis?

Newbie here, using the simulator in 2.7.4 to try to get a handle on mixing G92 with G54.

I've somehow managed to get my simulator to believe that the machine position is a couple hundred inches away from the origin. I can't home (error: end of move in home state 5). I can't G00 back to origin (error: Can't issue MDI command when not homed). Deleting the .VAR file didn't help.

How can I completely reset the simulator to factory defaults?

Thanks, but this doesn't actually work. As described above, I can't home the Z axis (maybe the sim is outside its limit switch, so it can't find the home switch?). One can't issue MDI commands without homing. So I really need a way to make the machine completely forget it's persistent state.

Thanks for your continued help, Big John. I tried about four different items in Machine->Zero Coordinate System; they each returned the "can't issue MDI command when not homed."

I am using a canned sim.axis machine called "axis.ini". It points to a VAR file called "sim.var". I shut down linuxcnc and deleted that file (and the .bak) from ~/linuxcnc/configs/sim.axis/. It did not exist anywhere else on the filesystem.

There's no effect, my Z-axis is still ridiculous, and won't home.

Try deleting position.txt in the config directory, that holds the axis positions between runs. Deleting it will set it all back to zero....

Try deleting position.txt in the config directory, that holds the axis positions between runs. Deleting it will set it all back to zero....

This is the answer! Thanks very mcuh.