Need to modify spectre netlist to get NF1

Belwo netlist will calculate NF2 but I want NF1. I tried by keeping same output probe and input probe to input port but terminate with error.
Error: same
Warning from spectre during SP analysis `sp'.
WARNING (SPECTRE-16056): pg: Same port used as input and output probe.

DC simulation time: CPU = 1 ms, elapsed = 343.084 us.

Error found by spectre at freq = 0 Hz during SP analysis `sp'.
ERROR (SPCRTRF-15129): Neither 'iprobe' nor 'oprobe' appears in the active
ports list. Make sure 'iprobe' and 'oprobe' are active and then
restart.

=====Netlist for NF2=====
simulator lang=spectre
global 0
parameters v_var=1
vg (g_dc 0) vsource dc=v_var
cg (g g_ac) capacitor c=1
lg (g g_dc) inductor l=1

vd (d_dc 0) vsource dc=v_var
cd (d d_ac) capacitor c=1
ld (d d_dc) inductor l=1

vs (s 0) vsource dc=0
vb (b 0) vsource dc=0

m1 ( d g s b) model1 l=0.52e-6 w=0.4e-6

pd (d_ac 0) port num=2
pg (g_ac 0) port num=1
simulatorOptions options reltol=1e-3 vabstol=1e-6 iabstol=1e-12 temp=27 \
tnom=27 scalem=1.0 scale=1.0 gmin=1e-12 rforce=1 maxnotes=5 maxwarns=5 \
digits=5 cols=80 pivrel=1e-3 sensfile="../psf/sens.output" \
checklimitdest=psf
sp sp ports=[pg pd] start=1e+4 stop=1e+13 donoise=yes \
oprobe=pd iprobe=pg annotate=status
modelParameter info what=models where=rawfile
element info what=inst where=rawfile
outputParameter info what=output where=rawfile
designParamVals info what=parameters where=rawfile
primitives info what=primitives where=rawfile
subckts info what=subckts where=rawfile
saveOptions options save=allpub

pg (g_ac 0) port num=1
pd (d_ac 0) port num=2

sp_nf1 sp ports=[pg pd] start=1e+4 stop=1e+13 donoise=yes \
oprobe=pg iprobe=pd annotate=status

sp_nf2 sp ports=[pg pd] start=1e+4 stop=1e+13 donoise=yes \
oprobe=pd iprobe=pg annotate=status