@User @User: So I incorporated Brad's script and my complementary script into the open_pdks Makefile, just commented out while I'm testing it. Brad's script works with no issues other than the mandatory parameter at the top of every testbench (I renamed it

mc_mm_switch

in anticipation of having the

mc_pr_switch

for process variation) (it seems that if I set this parameter =0 outside of the testbench then I cannot override the parameter from within the testbench). My script is, I think, doing the right thing, but the process parameters that get varied aren't in the path of

sky130.lib.spice

, but seem to be in the path

parameters/montecarlo.spice

. So @User is right that to get the process variation, it's probably necessary to set up another section in

sky130.lib.spice

called

mc

or

tt_mc

or whatever, and have it include

montecarlo.spice

and a few others that I think are related, like

r+c.mrp1monte.spice

. I'm still trying to figure out how to do this.