I was digging through history on Slack on these errors that I see when simulating NPN devices (xschem - ngspice) and noticed this comment from about a year ago. Should I plan to stay away from NPNs? At a first order the simulations appear to work fine for the NPNs, just that I can't get the multiply - "m" - parameter to work correctly and have to manually place the parallel devices.
> unrecognized parameter (dcap) - ignored
> unrecognized parameter (gap1) - ignored
> unrecognized parameter (gap2) - ignored
> npn bipolars have some issues in sky130. - Stefan