I am trying to do a monte carlo simulation so I select the corner mc, while I find sky130_fd_pr__pnp_05v5_W3p40L3p40 can not be included this way. Below is my super simple testing codes:

*Title: test mc include sky130_fd_pr__pnp_05v5_W3p40L3p40 or not
.lib " OPEN_PDKS_PATH/sky130A/libs.tech/ngspice/sky130.lib.spice" mc
XQ1 GND GND vbneg sky130_fd_pr__pnp_05v5_W3p40L3p40 m=39

I got error like this:

Circuit: *title: test mc include sky130_fd_pr__pnp_05v5_w3p40l3p40 or not

Error: unknown subckt: xq1 0 0 vbneg sky130_fd_pr__pnp_05v5_w3p40l3p40 m=39
    Simulation interrupted due to error!

Error: there aren't any circuits loaded.

Does anyone has suggestions towards which corner (tt/ff/...) to choose and how to set parameter mc_mm_switch/mc_pr_switch when doing monte carlo simulations.

Yet another error in the SkyWater sources. The

sky130.lib.spice

includes

parameters/montecarlo.spice

which includes all of the model files, including the NPNs, but is missing the PNPs. Just add the include lines for the PNPs in

montecarlo.spice

. I will write a script in the open_pdks installer to correct it.

Thanks you for fixing that. Does that indicate monte carlo simulations couldn't be run for the PNP by any means?

I haven't had time to figure that out. The values might be in a file somewhere that's being ignored, or the values might be able to be pulled from the e-test data tables.

Ok, I'd run a test on that and let you know if any updates about that.