Thanks @Kareem Farid @Mitch Bailey we found them, they looked like ignorable warnings about wires having no driver, but sorting that out has progressed the flow. 🙂 We are now embarking on the full ChipIgnite Caravel build for a mixed signal design... and anticipate running into a lot of problems. (The plan is by solving them we can hopefully help create a template for others submitting mixed signal designs on Caravel) ... is the best place to ask for help in this channel, or is a different one more appropriate?

#openlane-2 currently has 42 members. #analog-design has a few more. The description is

Channel for discussion about designing mixed-signal integrated circuits, including noise-shaping techniques, SAR ADCs and sigma-delta modulators.

Integration (physical design) and LVS of mixed signal designs has been done. I imagine most of your problems will be with mixed signal simulation.

Thanks! We have finished the layout and LVS, and I think we are planning to simulate the digital and analog parts separately for now for that exact reason!