Hi all, is there somewhere I can find an example of how to get the

d_source

device working in ngspice? I tried the example from the ngspice source repo working. At

ngspice-src/examples/xspice/d_source/d_source.cir

but it doesn't work and the error message is just "unknown device". I assume I need to include some file in the script to add the d_source device?