I have been working through the "Mixed-signal Simulation with TI-PSpice 2020" workbook. I have come up against an issue I have had a difficult time resolving in the final module. Module 16 "Noise Analysis with PSpice" brings up an error "ERROR(ORPSIM-15113): Model Q2N2222 used by Q_Q1 is undefined". I have tried looking around for a resolution without any meaningful success. If anyone could recommend a resolution or where I may find a resolution to allow for me to complete this module it would be greatly appreciated.