Alan G

Coincidentally, I think I ran into this exact issue today as well! It looks like the OP is using the popular IIC-OSIC-TOOLS docker container (https://github.com/iic-jku/IIC-OSIC-TOOLS). From the Docker build files, the container builds ngspice from source. The latest container (Release 2026.05) actually seems to get ngspice from the following place: Repo: https://github.com/danchitnis/ngspice-sf-mirror.git Tag: ngspice-46 I downloaded the zip of the repo (https://github.com/danchitnis/ngspice-sf-mirror/releases/tag/ngspice-46)...