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My vanilla minecraft works fine, but it's forge i have problems with. I restarted it three times, and nothing works. Please help!!! All of this started happening after I added the Backpacks mod to my mods. Not so sure what happened, but my mods included:

Optifine

Ars Magica 2

AnimationAPI

BiomesOPlenty

BiblioCraft

CraftGuide

CustomModSpawner

DecoCraft 2

Dr. Zharks Mo' Creatures

FairyLights

FoxLib

GrimoireOfGaia3

HarvestCraft

Rei'sMiniMap

SpaceCore

SurvivalWings

Thaumcraft4

TreeCapitator

so i tried with just optifine..

Crash Report :

---- Minecraft Crash Report ----
// My bad.

Time: 7/20/15 12:24 PM
Description: Initializing game

java.lang.NoSuchMethodError: net.minecraft.client.renderer.texture.TextureMap.<init>(ILjava/lang/String;Z)V
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:540)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:878)
at net.minecraft.client.main.Main.main(SourceFile:148)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

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

-- Head --
Stacktrace:
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:540)

-- Initialization --
Details:
Stacktrace:
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:878)
at net.minecraft.client.main.Main.main(SourceFile:148)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
Minecraft Version: 1.7.10
Operating System: Windows 8.1 (amd64) version 6.3
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 105629992 bytes (100 MB) / 294703104 bytes (281 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
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 v9.05 FML v7.10.99.99 Minecraft Forge 10.13.4.1492 Optifine OptiFine_1.7.10_HD_A4 3 mods loaded, 3 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCH mcp{9.05} [Minecraft Coder Pack] (minecraft.jar)
UCH FML{7.10.99.99} [Forge Mod Loader] (forge-1.7.10-10.13.4.1492-1.7.10.jar)
UCH Forge{10.13.4.1492} [Minecraft Forge] (forge-1.7.10-10.13.4.1492-1.7.10.jar)
Launched Version: 1.7.10-Forge10.13.4.1492-1.7.10
LWJGL: 2.9.1
OpenGL: Intel(R) HD Graphics 4600 GL version 4.2.0 - Build 10.18.10.3855, Intel
GL Caps: Using GL 1.3 multitexturing.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Anisotropic filtering is supported and maximum anisotropy is 16.
Shaders are available because OpenGL 2.1 is supported.

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: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Anisotropic Filtering: Off (1)

Never mind! All i needed to do was remove Optifine

Well It helps if you don't use optifine that is a year old...

I'm having the same issue even with the newest Optifine

Quote from JohnsBack»

I'm having the same issue even with the newest Optifine

Make your own thread and post a log.