@Adithyaa V What transistor models are you running montecarlo on ? How old is your open_pdks install? Can you please check if these transistor models:

.../share/pdk/sky130A/libs.ref/sky130_fd_pr/spice/sky130_fd_pr__nfet_01v8__tt.pm3.spice

or

.../share/pdk/sky130A/libs.ref/sky130_fd_pr/spice/sky130_fd_pr__nfet_g5v0d10v5__tt.pm3.spice

do have some gauss() function (not commented out) ? I have mismatch/montecarlo simulations examples (with

tt_mm

corner) that used to work since months, but no longer work after an open_pdks update.

@Stefan Schippers I’m running monte carlo on nfet_01v8 and pfet_01v8. My open_pdks install is about 3 months old. Yes, I have a gauss() function that is not commented out.