Why this is happing ? i have no idea

Cell analog in netlist has not been loaded.

This is the spice netlist i want to be loaded for port matching in magic.

**.subckt analog_tb
X1 VN VP Y analog
V1 VP VN 1.8
.save i(v1)
**** begin user architecture code


.lib ~/open_pdks/sources/sky130-pdk/libraries/sky130_fd_pr/latest/models/sky130.lib.spice tt
.control
save all
tran 1u 0.001
plot v(y)
.endc

.subckt analog VN VP Y

XM2 net1 Y VP VP sky130_fd_pr__pfet_01v8 L=0.15 W=1.68 nf=2 ad='int((nf+1)/2) * W/nf * 0.29' as='int((nf+2)/2) * W/nf * 0.29'
+ pd='2*int((nf+1)/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 mult=1 m=1
XM1 net2 net1 VP VP sky130_fd_pr__pfet_01v8 L=0.15 W=1.68 nf=2 ad='int((nf+1)/2) * W/nf * 0.29' as='int((nf+2)/2) * W/nf * 0.29'
+ pd='2*int((nf+1)/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 mult=1 m=1
XM3 Y net2 VP VP sky130_fd_pr__pfet_01v8 L=0.15 W=1.68 nf=2 ad='int((nf+1)/2) * W/nf * 0.29' as='int((nf+2)/2) * W/nf * 0.29'
+ pd='2*int((nf+1)/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 mult=1 m=1
XM4 net1 Y VN VN sky130_fd_pr__nfet_01v8 L=0.15 W=0.84 nf=2 ad='int((nf+1)/2) * W/nf * 0.29' as='int((nf+2)/2) * W/nf * 0.29'
+ pd='2*int((nf+1)/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 mult=1 m=1
XM5 net2 net1 VN VN sky130_fd_pr__nfet_01v8 L=0.15 W=0.84 nf=2 ad='int((nf+1)/2) * W/nf * 0.29' as='int((nf+2)/2) * W/nf * 0.29'
+ pd='2*int((nf+1)/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 mult=1 m=1
XM6 Y net2 VN VN sky130_fd_pr__nfet_01v8 L=0.15 W=0.84 nf=2 ad='int((nf+1)/2) * W/nf * 0.29' as='int((nf+2)/2) * W/nf * 0.29'
+ pd='2*int((nf+1)/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 mult=1 m=1
XC1 net1 VN sky130_fd_pr__cap_mim_m3_1 W=1000 L=1000 MF=1 m=1
XC2 net2 VN sky130_fd_pr__cap_mim_m3_1 W=1000 L=1000 MF=1 m=1
XC3 Y VN sky130_fd_pr__cap_mim_m3_1 W=1000 L=1000 MF=1 m=1
.ends

.end

@Partha Singha Roy what does the cell contain?

@Partha Singha Roy: You have a mismatch between your layout, which is called

ANALOG_0

, and the netlist, which is called

analog

. Upper/lowercase is probably not important, but the

_0

is.