Stuck on "Building Terrain"

[CreepersRule]

Why do I always get stuck on "Building Terrain" and my Minecraft world never loads?

[CreepersRule]

[11:44:15] [main/INFO]: Setting user: PapaWood2285
[11:44:21] [main/INFO]: LWJGL Version: 2.9.4
[11:44:30] [main/INFO]: Reloading ResourceManager: Default, FMLFileResourcePack:Forge Mod Loader, FMLFileResourcePack:Minecraft Forge, FMLFileResourcePack:Better PvP, FMLFileResourcePack:Bouncing Balls, FMLFileResourcePack:CXLibrary, FMLFileResourcePack:Friendly Fire, FMLFileResourcePack:Interaction Wheel, FMLFileResourcePack:iTorch, FMLFileResourcePack:Just Enough Items, FMLFileResourcePack:Jukebox Mod, FMLFileResourcePack:Just Enough Buttons, FMLFileResourcePack:Level Up! Reloaded, FMLFileResourcePack:More Furnaces, FMLFileResourcePack:Multi Page Chest, FMLFileResourcePack:Pandora's Box, FMLFileResourcePack:Personal Cars, FMLFileResourcePack:Tool Belt, FMLFileResourcePack:Whole Tree Axe, Sky_Water Demo Pack
[11:44:32] [main/INFO]: [STDOUT]: Registering :itorch:i_torch
[11:44:32] [main/INFO]: [STDOUT]: Registering :itorch:i_torch_blue
[11:44:32] [main/INFO]: [STDOUT]: Registering :itorch:i_torch_white
[11:44:32] [main/INFO]: [STDOUT]: Registering :itorch:i_torch_green
[11:44:32] [main/INFO]: [STDOUT]: Registering :itorch:i_torch_black
[11:44:32] [main/INFO]: [STDOUT]: Registering :itorch:i_torch_red
[11:44:32] [main/INFO]: [STDOUT]: Registering :itorch:i_torch_gray
[11:44:32] [main/INFO]: [STDOUT]: Registering :itorch:i_torch_lime
[11:44:32] [main/INFO]: [STDOUT]: Registering :itorch:i_torch_cyan
[11:44:32] [main/INFO]: [STDOUT]: Registering :itorch:i_torch_brown
[11:44:32] [main/INFO]: [STDOUT]: Registering :itorch:i_torch_purple
[11:44:32] [main/INFO]: [STDOUT]: Registering :itorch:i_torch_pink
[11:44:32] [main/INFO]: [STDOUT]: Registering :itorch:i_torch_orange
[11:44:32] [main/INFO]: [STDOUT]: Registering :itorch:i_torch_magenta
[11:44:32] [main/INFO]: [STDOUT]: Registering :itorch:i_torch_light_blue
[11:44:32] [main/INFO]: [STDOUT]: Registering :itorch:i_torch_light_gray
[11:44:40] [Sound Library Loader/INFO]: Starting up SoundSystem...
[11:44:40] [Thread-5/INFO]: Initializing LWJGL OpenAL
[11:44:40] [Thread-5/INFO]: (The LWJGL binding of OpenAL.  For more information, see http://www.lwjgl.org)
[11:44:40] [Thread-5/INFO]: OpenAL initialized.
[11:44:40] [Sound Library Loader/INFO]: Sound engine started
[11:45:14] [main/INFO]: Created: 512x512 textures-atlas
[11:45:19] [Bouncing Balls Update Checker/INFO]: [STDOUT]: Latest Mod Version = 1.5.1
[11:45:19] [Bouncing Balls Update Checker/INFO]: [STDOUT]: Your Mod Version = 1.5.1
[11:45:21] [main/INFO]: Narrator library for x64 successfully loaded
[11:45:29] [main/INFO]: Deleting level Modded Survival
[11:45:29] [main/INFO]: Attempt 1...
[11:45:43] [Server thread/INFO]: Starting integrated minecraft server version 1.12
[11:45:43] [Server thread/INFO]: Generating keypair
[11:45:45] [Server thread/INFO]: Loaded 488 advancements
[11:45:45] [Server thread/INFO]: Preparing start region for level 0
[11:45:47] [Server thread/INFO]: Preparing spawn area: 4%
[11:45:48] [Server thread/INFO]: Preparing spawn area: 11%
[11:45:49] [Server thread/INFO]: Preparing spawn area: 20%
[11:45:50] [Server thread/INFO]: Preparing spawn area: 31%
[11:45:51] [Server thread/INFO]: Preparing spawn area: 42%
[11:45:52] [Server thread/INFO]: Preparing spawn area: 51%
[11:45:53] [Server thread/INFO]: Preparing spawn area: 57%
[11:45:54] [Server thread/INFO]: Preparing spawn area: 65%
[11:45:55] [Server thread/INFO]: Preparing spawn area: 74%
[11:45:56] [Server thread/INFO]: Preparing spawn area: 83%
[11:45:57] [Server thread/INFO]: Preparing spawn area: 91%
[11:45:58] [Server thread/INFO]: Stopping server
[11:45:58] [Server thread/INFO]: Saving players
[11:45:58] [Server thread/INFO]: Saving worlds
[11:45:58] [Server thread/INFO]: Saving chunks for level 'Modded Survival'/overworld
[11:46:02] [Server thread/INFO]: Saving chunks for level 'Modded Survival'/the_nether
[11:46:03] [Server thread/INFO]: Saving chunks for level 'Modded Survival'/the_end
 

A lot of times it took too long to load so I used Task Manager to end it out of rage. Does this problem have anything to do with the iTorch mod? Hope not...

[larsgerrits]

That's not the FML log. The FML log is a file called fml-client-latest.org inside the logs folder of your game directory.

[CreepersRule]

I just read the FML log and it is huge. I couldn't even post it on here because then my computer wouldn't respond, but I saw the problem. It was the Pandora's Box mod, which, by happenstance, was one of the mods I just recently downloaded. Now my worlds are fixed. Thanks.

[Choonster]

7 hours ago, CreepersRule said:

I just read the FML log and it is huge. I couldn't even post it on here because then my computer wouldn't respond, but I saw the problem. It was the Pandora's Box mod, which, by happenstance, was one of the mods I just recently downloaded. Now my worlds are fixed. Thanks.

 

In future, you can use Gist or Pastebin to post large log files.