Hi @User have you managed to get the

nfet_20v0_zvt

model working? It looks like it's missed by your "nf" parameter reordering patch. I tried to change it in the spice file but it looks like it's happening somewhere else I haven't found yet. The error I get is the same as before

Error: unknown subckt: xm1 net6 net6 0 0 sky130_fd_pr__nfet_20v0_zvt w=20.0 l=0.5 ad={int((nf+1)/2)*w/nf*0.29} pd={2*int((nf+1)/2)*(w/nf+0.29)} as={int((nf+2)/2)*w/nf*0.29} ps={2*int((nf+2)/2)*(w/nf+0.29)} nrd={0.29/w} nrs={0.29/w} sa=0 sb=0 sd=0 nf=1 mult=1 m=1
    Simulation interrupted due to error!