MC: 1.10.2
Forge: 2511
Railcraft: 10.3.1

Gist: https://gist.github.com/janagyjr/f777b52ea209d19bf9ec6d85f1094899

Crashes during load and is fine when disabled.

it looks like coremod hacks. the fluid field is always initialized by that point in code. can you produce the crash with only ie and rc?

I'll disable everything but RC and see what that gets me

I've disabled IE and IC2 and enabled RC but it still crashes during load. I cannot get the pack to load with RC. I was about to go and see if I could disable creosote in RC and just use the IE one (even if I have to adjust recipes to make it work).

Same
https://gist.github.com/janagyjr/1db33c6fc52bccac21dab0cd662f6dd7

This should not error. I don't know what causes the error exactly.

I cannot reproduced this bug @janagyjr. It is most likely your launcher's fault.