Caused by: java.lang.ClassNotFoundException: net.minecraft.world.WorldManager [SOLVED]

[evilsubs2]

Recently been building my own with my fiancee out of our favorite mods and we've added just about 47 and if we add any more we start getting a exception in server tick loop apparently caused by 1.7.10's integrated servers? has happened on multiple machines from adding multiple packs, I managed to make it work with journey map by increasing max chunk load size in forge's config file but the error is still happening on my fiancee's machine. I am at a loss for how to fix this.

Modpack

crash-report.txt

just happened on my machine, this was what happened in the console. http://pastebin.com/ZdQPTmCg

Edited November 7, 2015 by evilsubs2

[evilsubs2]

Latest in the forge client http://pastebin.com/fDWq619a this is happening when attempting to load a world

[evilsubs2]

if i get the game running on my computer, fiancee can join in without problem but is stuck with about a ten second delay

[evilsubs2]

if i fresh install and change the chunk settings it will launch worlds but if I close the game and load it again it starts crashing.

[evilsubs2]

[SOLVED] Thaumic Horizons was at fault, vidently that mod consistently breaks modpacks.