I am trying to do my post layout simulation of my opamp, i have included the magic spice file path in code_shown.sym, and changed the opamp symbol from subcircuit to primative, when i try to simulate it is throwing up the following error.

@Pathan Rehman Ahmed khan-student You’re trying to simulate from the

opamp_tb.sch

correct? It includes an

opamp

symbol. The spice file you include is

opamp_flatten.spice

. It does not have an

opamp

circuit. It contains the

opamp_flatten

circuit. This is why you get the error. The

opamp

circuit is not defined.

got it sir, thankyou.. I figured out and i got the results.. but, i have another question.. I want to simulate the standard skywater 130 cells in xschem ngspice, but when i try to simulate it.. says unknown subckt.. is there any way to simulate sky's standard cells?