Hello and thank you for bringing the mod up to date!

Idk if this is an issue but some techs like swamp farming environment show all the pre reqs as green but it still wont let me research it and says there are pre reqs missing. A few others do it as well. Does anyone know how to figure out what's missing? I thought maybe it's a trigger tech but that usually shows up in the tech tree.

Hi,
Thanks for your report.

Good instinct.
It wasn't a trigger tech, it was a hidden one.
Angel's 2.1 moved brass to Brass processing and disabled Zinc processing, but Sea Block still listed Zinc processing as a prerequisite of the environment farms and about ten other technologies (Assembling machine 3 and Military 3 among them).
The tech tree doesn't draw disabled technologies, so everything looked green while the game still reported one missing.
Version 2.1.9 fixes it, along with Artillery and, with ScienceCostTweakerM, Production science pack.

If you don't want to wait for the update, this unblocks your current save (it disables achievements for that save):

/c game.player.force.technologies["bob-zinc-processing"].researched = true

Zinc processing doesn't unlock anything any more, so this has no other effect, and it's safe to keep once 2.1.9 is out.

Happy to help. There's much to do in this mod so I can wait. Thanks again!

I found more bugs later in the game where recipes or technologies are hidden or can't be reached. Most come from changes in Angel's 2.1 and Bob's 3.0 that Sea Block hadn't caught up with yet.

Version 2.1.10 fixes the ones I've tracked down so far.

There are probably more of these that I haven't found yet. Angel's 2.1 wasn't really built with Sea Block in mind, so tracking them all down will take a while.

If you hit a research you can't complete, or a recipe that asks for something you can't make, please report it with the technology or item name. That's the fastest way for me to find the rest.

That was quick, man. I'll report back if I find any.