TT_Model file missed... I am trying to simulate a simple example, an inverter cmos. Looking a tutorial I don't find this "TT_MODEL" . I don't have in the library the second option. How can install? tutorial from:

the TT_MODELS is the instance name of a

devices/code.sym

element. However the best way to place such element in your design is copying (Ctrl-c) and pasting (ctrl-v) from the top schematic page (sky130_tests/top.sch)