#231 npn13g2 subckt simulation problem Issue created by britovski Environment • Klayout Version: 0.29.7 • OS/Platform: linux • XSchem 3.4.5 • NGSpice 43 Expected Behavior both TBs (inv_ttl_tran and inv_ttl_tran2) are expected to work since the only difference is that transistors in one of them are inside a subckt. Actual Behavior TB with subckt doesn't work and gave a subckt error message: Error: unknown subckt: x1.xq1 out x1.net1 0 0 x1.npn13g2 Simulation interrupted due to error! Steps to Reproduce the Problem 1. just run 'ngspice inv_ttl_tran.spice' in attached testcase that error message will appear. Both TB netlists and xschem files are provided in attachment as a testcase. inv_ttl.tar.gz PS: I didn't have problems with MOSFETs using the same hierarchy flow on xschem/ngspice. IHP-GmbH/IHP-Open-PDK