Hi @Tim Edwards @Stefan Schippers, I am facing a weird issue. In my design I am using PNP transistor,

pnp_05v5_W3p40L3p40

for PTAT circuit. I am using model file from

/libs.tech/combined/sky130.lib.spice

for simulation. When I run simulation on the schematic directly (without symbol or test bench) everything works fine. But when I create a test bench using the symbol of the same schematic, the PNP transistors are not recognized. I get the following error : attached the image. I need to run monte carlo on the PEX netlist which requires using a symbol and test bench but that is not working with PNP transistors present in the design. Can you please help me with the issue? I have attached a schematic and test bench for reference as well.

@naina singhal I have tested your example and I get the same error. Using the old binned models (

.../ngspice/sky130.lib.spice tt

, instead of

.../combined/sky130.lib.spice tt

) works, so there seem to be a difference in the models.

@Stefan Schippers It is working now. Thank you so much for your help. 🙂