Mods introducing new content into the game.
Furnaces, assembling machines, production chains.
Instead of graphite, the assumed intended progression to craft electronic components, James' Oily Extravaganza uses Carbon, which can only be crafted with a science that requires electronic circuits to craft.
Next version will have a check so that it doesn't replace coal with carbon if that mod is in use.
Forgot I'd still had this sitting around, but the fix is up now.