Every time I try to generate a world with Forge installed, I get a crash. I've tried re-installing several times and have watched many videos to make sure I'm doing everything correctly. I'm about to give up on mods and play vanilla for good, but as a last resort, I've come here to ask for any help whatsoever. PLEASE HELP! :'(

 

Here is the crash report:

 

---- Minecraft Crash Report ----

// You should try our sister game, Minceraft!

 

Time: 6/15/14 12:57 PM

Description: Starting integrated server

 

java.lang.ExceptionInInitializerError

at net.minecraft.server.MinecraftServer.<init>(MinecraftServer.java:140)

at net.minecraft.server.integrated.IntegratedServer.<init>(IntegratedServer.java:45)

at net.minecraft.client.Minecraft.func_71371_a(Minecraft.java:2041)

at net.minecraft.client.gui.GuiCreateWorld.func_146284_a(GuiCreateWorld.java:230)

at net.minecraft.client.gui.GuiScreen.func_73864_a(GuiScreen.java:225)

at net.minecraft.client.gui.GuiCreateWorld.func_73864_a(GuiCreateWorld.java:377)

at net.minecraft.client.gui.GuiScreen.func_146274_d(GuiScreen.java:301)

at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:268)

at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1579)

at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:916)

at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:835)

at net.minecraft.client.main.Main.main(SourceFile:103)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at net.minecraft.launchwrapper.Launch.launch(Launch.java:134)

at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

Caused by: java.lang.IllegalStateException: failed to create a child event loop

at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:61)

at io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:49)

at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:61)

at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:52)

at net.minecraft.network.NetworkSystem.<clinit>(NetworkSystem.java:47)

... 18 more

Caused by: io.netty.channel.ChannelException: failed to open a new selector

at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:128)

at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:120)

at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:87)

at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:57)

... 22 more

Caused by: java.io.IOException: Unable to establish loopback connection

at sun.nio.ch.PipeImpl$Initializer.run(Unknown Source)

at sun.nio.ch.PipeImpl$Initializer.run(Unknown Source)

at java.security.AccessController.doPrivileged(Native Method)

at sun.nio.ch.PipeImpl.<init>(Unknown Source)

at sun.nio.ch.SelectorProviderImpl.openPipe(Unknown Source)

at java.nio.channels.Pipe.open(Unknown Source)

at sun.nio.ch.WindowsSelectorImpl.<init>(Unknown Source)

at sun.nio.ch.WindowsSelectorProvider.openSelector(Unknown Source)

at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:126)

... 25 more

Caused by: java.net.ConnectException: Connection timed out: connect

at sun.nio.ch.Net.connect0(Native Method)

at sun.nio.ch.Net.connect(Unknown Source)

at sun.nio.ch.Net.connect(Unknown Source)

at sun.nio.ch.SocketChannelImpl.connect(Unknown Source)

at java.nio.channels.SocketChannel.open(Unknown Source)

... 34 more

 

 

A detailed walkthrough of the error, its code path and all known details is as follows:

---------------------------------------------------------------------------------------

 

-- Head --

Stacktrace:

at net.minecraft.server.MinecraftServer.<init>(MinecraftServer.java:140)

at net.minecraft.server.integrated.IntegratedServer.<init>(IntegratedServer.java:45)

 

-- Starting integrated server --

Details:

Level ID: New World

Level Name: New World

Stacktrace:

at net.minecraft.client.Minecraft.func_71371_a(Minecraft.java:2041)

at net.minecraft.client.gui.GuiCreateWorld.func_146284_a(GuiCreateWorld.java:230)

at net.minecraft.client.gui.GuiScreen.func_73864_a(GuiScreen.java:225)

at net.minecraft.client.gui.GuiCreateWorld.func_73864_a(GuiCreateWorld.java:377)

at net.minecraft.client.gui.GuiScreen.func_146274_d(GuiScreen.java:301)

at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:268)

 

-- Affected screen --

Details:

Screen name: net.minecraft.client.gui.GuiMainMenu

Stacktrace:

at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1579)

at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:916)

at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:835)

at net.minecraft.client.main.Main.main(SourceFile:103)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at net.minecraft.launchwrapper.Launch.launch(Launch.java:134)

at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

 

-- System Details --

Details:

Minecraft Version: 1.7.2

Operating System: Windows 7 (x86) version 6.1

Java Version: 1.7.0_60, Oracle Corporation

Java VM Version: Java HotSpot Client VM (mixed mode, sharing), Oracle Corporation

Memory: 98521304 bytes (93 MB) / 191188992 bytes (182 MB) up to 518979584 bytes (494 MB)

JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M

AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used

IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0

FML: MCP v9.03 FML v7.2.211.1121 Minecraft Forge 10.12.2.1121 3 mods loaded, 3 mods active

mcp{9.03} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available

FML{7.2.211.1121} [Forge Mod Loader] (forge-1.7.2-10.12.2.1121.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available

Forge{10.12.2.1121} [Minecraft Forge] (forge-1.7.2-10.12.2.1121.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available

Launched Version: 1.7.2-Forge10.12.2.1121

LWJGL: 2.9.0

OpenGL: GeForce GTX 670M/PCIe/SSE2 GL version 4.4.0, NVIDIA Corporation

Is Modded: Definitely; Client brand changed to 'fml,forge'

Type: Client (map_client.txt)

Resource Packs: []

Current Language: English (US)

Profiler Position: N/A (disabled)

Vec3 Pool Size: ~~ERROR~~ NullPointerException: null

Anisotropic Filtering: Off (1)

Try adding

-Djava.net.preferIPv4Stack=true

to the VM args in the profile options.

 

IT WORKED! THANK YOU SO MUCH!

 

I really appreciate the help. If you don't mind, could you elaborate a little on what the problem was and why this helped?

Hmmm. Now I can't even get Minecraft to launch. I get the following Java error in a separate window:

 

Error: Could not create the Java Virtual Machine.

Error: A fatal exception has occurred. Program will exit.

 

Any idea what this could be?