Hi, I was trying on the level shifter and the simulations went on an error. Is there any problem with the simulations?

When you use the level shifter, you need an extra line in your testbench to include the HVL standard cell library:

.lib {PDK_ROOT}/{PDK}/libs.ref/sky130_fd_sc_hvl/spice/sky130_fd_sc_hvl.spice

There is an example of this in my example at https://github.com/RTimothyEdwards/sky130_ef_ip__rdac3v_8bit

Got it, thank you.