We just researched Railway, and got no locomotive or wagon recipes at all. No vanilla ones, no mini ones. Multiplayer. I am able to manufacture rails but not rolling stock. No recipes are showing in the "effects" area of the Railway tech description either. Are we unaware of another mechanic? Or is this maybe because I turned on Train Interiors yesterday on an existing game, and then researched railway? Is there any way to fix the existing game? (even console, we don't care about achievements.)

Let me check ✔️

Sorry, but I need more time to investigate this. It appears to be a fairly significant compatibility issue, and I still can’t give you a definite answer about whether it can be fixed safely.

Train Interiors was originally designed to be enabled from the beginning of a new game. Enabling it halfway through an existing save makes things much more complicated, because the mod has to recreate or activate systems that normally run only during initial world and chunk generation. I need to check carefully whether those commands can be applied retroactively without damaging the save or introducing new bugs.

I may be able to prepare a fix by tomorrow, but I can’t promise that yet. I’ll update you as soon as I have a reliable answer.