Intro:

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Issue Description:

Crash on step 6/7, unable to identify problem

Script used

irrelevant, crashes identically even with no scripts, but will provide if necessary

crafttweaker.log file

https://pastebin.com/T021zV87

Affected Versions (Do not use "latest"):

• Minecraft: 1.12.2
• Forge: 14.23.5.2847
• Crafttweaker: CraftTweaker2-1.12-4.1.20.601
• Using a server: no

Your most recent log file where the issue was present

https://gist.github.com/Timberlystumcain/7020b247f8027102854dc7fe8d3cf15f

This was closed in #1108

You can use #disable_search_tree in your script and that should help

[INITIALIZATION][CLIENT][ERROR] oredict\cavesncliffs.zs:2: Could not resolve <caves_and_cliffs : copper_ore>
[INITIALIZATION][CLIENT][ERROR] oredict\cavesncliffs.zs:5: Could not resolve <caves_and_cliffs : copper_ingot>
[INITIALIZATION][CLIENT][ERROR] oredict\cavesncliffs.zs:8: Could not resolve <caves_and_cliffs : copper_block>
[INITIALIZATION][CLIENT][ERROR] [crafttweaker]: Error executing {[0:crafttweaker]: oredict\cavesncliffs.zs}: null

It tells you that it cannot find these bracket handlers.
oredict\cavesncliffs.zs:2, file cavesncliffs.zs in folder scripts/oredict, line 2.
Make sure these items exist with the same name as they have in the game. Use /ct hand to get the proper name.

You can also use /ct syntax to validate your syntax without needing to restart the game.

that's not the issue unfortunately. I just made sure and removed all scripts that error in the startup crafttweaker.log

The game crashes on startup at the "finishing up" step. this is my latest crash .txt and this is my latest latest.log

CraftTweaker will instruct Minecraft to recalculate its search trees after it's done.
The search trees are what is used by e.g. the recipe book in the crafting table.
Somewhere in there it errors apparently.

I'll look into it

Huh.. I found that just removing FutureMC is enough to make the game boot normally. I did have a script for it, but even after removing it it still crashes.. What's especially weird to me is that I've had both CT and F MC installed for ages without updating without any problems, so I imagine it's some interaction with another mod

I had the same error, tried to recreate it by taking out mods we had in common, nothing seemed to work. Had a clean install with the same mods, excluding ItemPhysics, its library, and BedPatch, and it did work, at least until I added ItemPhysics and the library. So that's my guess at the culprit. Good luck!