When I launch minecraft forge the minecraft launcher closes and then minecraft doesn't start. I am using the latest version of forge for 1.7.2 and I did use the installer. I even tried running forge without mods in and it still doesn't work so I know it isn't one of the mods. Here is the log:

[18:36:48] [main/INFO] [FML/]: Forge Mod Loader version 7.2.211.1121 for Minecraft 1.7.2 loading

[18:36:48] [main/INFO] [FML/]: Java is Java HotSpot 64-Bit Server VM, version 1.8.0_20, running on Windows 7:amd64:6.1, installed at C:\Program Files\Java\jre1.8.0_20

[18:36:48] [main/DEBUG] [FML/]: Java classpath at launch is C:\Users\Harry\AppData\Roaming\.minecraft\libraries\net\minecraftforge\forge\1.7.2-10.12.2.1121\forge-1.7.2-10.12.2.1121.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\net\minecraft\launchwrapper\1.9\launchwrapper-1.9.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\org\ow2\asm\asm-all\4.1\asm-all-4.1.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-library\2.10.2\scala-library-2.10.2.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-compiler\2.10.2\scala-compiler-2.10.2.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\java3d\vecmath\1.3.1\vecmath-1.3.1.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\net\sf\trove4j\trove4j\3.0.3\trove4j-3.0.3.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\lzma\lzma\0.0.1\lzma-0.0.1.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\io\netty\netty-all\4.0.10.Final\netty-all-4.0.10.Final.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\15.0\guava-15.0.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.4\gson-2.2.4.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\com\mojang\authlib\1.3\authlib-1.3.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-api\2.0-beta9\log4j-api-2.0-beta9.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-core\2.0-beta9\log4j-core-2.0-beta9.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.0\lwjgl-2.9.0.jar;C:\Users\Harry\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.0\lwjgl_util-2.9.0.jar;C:\Users\Harry\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.2.1121\1.7.2-Forge10.12.2.1121.jar

[18:36:48] [main/DEBUG] [FML/]: Java library path at launch is C:\Users\Harry\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.2.1121\1.7.2-Forge10.12.2.1121-natives-90740989362525

[18:36:48] [main/DEBUG] [FML/]: Enabling runtime deobfuscation

[18:36:48] [main/DEBUG] [FML/]: Instantiating coremod class FMLCorePlugin

[18:36:48] [main/DEBUG] [FML/]: Added access transformer class cpw.mods.fml.common.asm.transformers.AccessTransformer to enqueued access transformers

[18:36:48] [main/DEBUG] [FML/]: Enqueued coremod FMLCorePlugin

[18:36:48] [main/DEBUG] [FML/]: Instantiating coremod class FMLForgePlugin

[18:36:48] [main/DEBUG] [FML/]: Added access transformer class net.minecraftforge.transformers.ForgeAccessTransformer to enqueued access transformers

[18:36:48] [main/DEBUG] [FML/]: Enqueued coremod FMLForgePlugin

[18:36:48] [main/DEBUG] [FML/]: All fundamental core mods are successfully located

[18:36:48] [main/DEBUG] [FML/]: Discovering coremods

[18:36:48] [main/INFO] [LaunchWrapper/]: Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

[18:36:48] [main/INFO] [LaunchWrapper/]: Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker

[18:36:48] [main/INFO] [LaunchWrapper/]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

[18:36:48] [main/ERROR] [LaunchWrapper/]: Unable to launch

java.util.ConcurrentModificationException

at java.util.ArrayList$Itr.checkForComodification(Unknown Source) ~[?:1.8.0_20]

at java.util.ArrayList$Itr.remove(Unknown Source) ~[?:1.8.0_20]

at net.minecraft.launchwrapper.Launch.launch(Launch.java:117) [launchwrapper-1.9.jar:?]

at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.9.jar:?]

 

I hope somebody can help I really want to make a mod but can't without forge. Please help.

 

Read the EAQ.

And also: Seriously, one post down: http://www.minecraftforge.net/forum/index.php/topic,23269.0.html

Sorry. I didn't realise I was using java 8 I do apolgise. I feel kind of stupid now.

i recently wanted to get the star wars mod for 1.7.2 forge 10.12.2.1147, so i got the forge and the mod and I installed the forge without any problems and i launched the launcher and when i click play nothing happends. Heres the log:

 

[11:12:46] [main/INFO] [FML/]: Forge Mod Loader version 7.2.217.1147 for Minecraft 1.7.2 loading

[11:12:46] [main/INFO] [FML/]: Java is Java HotSpot Client VM, version 1.8.0_45, running on Windows 7:x86:6.1, installed at C:\Program Files (x86)\Java\jre1.8.0_45

[11:12:46] [main/DEBUG] [FML/]: Java classpath at launch is C:\Users\Callum\AppData\Roaming\.minecraft\libraries\net\minecraftforge\forge\1.7.2-10.12.2.1147\forge-1.7.2-10.12.2.1147.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\net\minecraft\launchwrapper\1.9\launchwrapper-1.9.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\org\ow2\asm\asm-all\4.1\asm-all-4.1.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-library\2.10.2\scala-library-2.10.2.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-compiler\2.10.2\scala-compiler-2.10.2.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\java3d\vecmath\1.3.1\vecmath-1.3.1.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\net\sf\trove4j\trove4j\3.0.3\trove4j-3.0.3.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\lzma\lzma\0.0.1\lzma-0.0.1.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\io\netty\netty-all\4.0.10.Final\netty-all-4.0.10.Final.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\15.0\guava-15.0.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.4\gson-2.2.4.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\com\mojang\authlib\1.3\authlib-1.3.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-api\2.0-beta9\log4j-api-2.0-beta9.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-core\2.0-beta9\log4j-core-2.0-beta9.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.0\lwjgl-2.9.0.jar;C:\Users\Callum\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.0\lwjgl_util-2.9.0.jar;C:\Users\Callum\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.2.1147\1.7.2-Forge10.12.2.1147.jar

[11:12:46] [main/DEBUG] [FML/]: Java library path at launch is C:\Users\Callum\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.2.1147\1.7.2-Forge10.12.2.1147-natives-3762927363844

[11:12:46] [main/DEBUG] [FML/]: Enabling runtime deobfuscation

[11:12:46] [main/DEBUG] [FML/]: Instantiating coremod class FMLCorePlugin

[11:12:46] [main/DEBUG] [FML/]: Added access transformer class cpw.mods.fml.common.asm.transformers.AccessTransformer to enqueued access transformers

[11:12:46] [main/DEBUG] [FML/]: Enqueued coremod FMLCorePlugin

[11:12:46] [main/DEBUG] [FML/]: Instantiating coremod class FMLForgePlugin

[11:12:46] [main/DEBUG] [FML/]: Added access transformer class net.minecraftforge.transformers.ForgeAccessTransformer to enqueued access transformers

[11:12:46] [main/DEBUG] [FML/]: Enqueued coremod FMLForgePlugin

[11:12:46] [main/DEBUG] [FML/]: All fundamental core mods are successfully located

[11:12:46] [main/DEBUG] [FML/]: Discovering coremods

[11:12:46] [main/INFO] [LaunchWrapper/]: Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

[11:12:46] [main/INFO] [LaunchWrapper/]: Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker

[11:12:46] [main/INFO] [LaunchWrapper/]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

[11:12:46] [main/ERROR] [LaunchWrapper/]: Unable to launch

java.util.ConcurrentModificationException

at java.util.ArrayList$Itr.checkForComodification(Unknown Source) ~[?:1.8.0_45]

at java.util.ArrayList$Itr.remove(Unknown Source) ~[?:1.8.0_45]

at net.minecraft.launchwrapper.Launch.launch(Launch.java:117) [launchwrapper-1.9.jar:?]

at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.9.jar:?]

 

Dont use 1.7.2 there is literally no sane reason to. Use 1.7.10

What is the issue it will not work its 1.7.2

 

---- Minecraft Crash Report ----

// Who set us up the TNT?

 

Time: 11/26/15 8:45 PM

Description: Initializing game

 

java.lang.NullPointerException: Initializing game

at cpw.mods.fml.common.Loader.preinitializeMods(Loader.java:506)

at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:239)

at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:467)

at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:815)

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)

 

 

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

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

 

-- Head --

Stacktrace:

at cpw.mods.fml.common.Loader.preinitializeMods(Loader.java:506)

at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:239)

at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:467)

 

-- Initialization --

Details:

Stacktrace:

at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:815)

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 10 (amd64) version 10.0

Java Version: 1.7.0_80, Oracle Corporation

Java VM Version: Java HotSpot 64-Bit Server VM (mixed mode), Oracle Corporation

Memory: 89452656 bytes (85 MB) / 249237504 bytes (237 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 v9.03 FML v7.2.217.1147 Minecraft Forge 10.12.2.1147 Optifine OptiFine_1.7.2_HD_U_D4 23 mods loaded, 0 mods active

mcp{9.03} [Minecraft Coder Pack] (minecraft.jar)

FML{7.2.217.1147} [Forge Mod Loader] (forge-1.7.2-10.12.2.1147.jar)

Forge{10.12.2.1147} [Minecraft Forge] (forge-1.7.2-10.12.2.1147.jar)

radixcore{1.2.0} [RadixCore] (1.7.2)

battlegear2{1.0.5.5} [Mine & Blade Battlegear 2 - Bullseye] ([1.7.2] Mine & Blade Battlegear 2 - Bullseye - 1.0.5.5.jar)

DamageIndicatorsMod{3.1.1} [Damage Indicators] ([1.7.2]DamageIndicatorsMod-3.1.1.jar)

ArchimedesShips{1.7.2 v1.7.0} [Archimedes' Ships] (ArchimedesShips.jar)

BiblioCraft{1.7.5} [biblioCraft] (BiblioCraft[v1.7.5][MC1.7.2].jar)

OblisgrMod{1.2.1} [OblisgrMod] (clothing.zip)

customnpcs{1.7.2-2} [CustomNpcs] (CustomNPCs_1.7.2-2.jar)

props{1.9} [Decocraft] (decocraft.zip)

fossil{1.7.2 Build 7.0.1} [Fossils and Archeology Revival] (Fossils_Archeology_Revival-1.7.2_Build-7.0.1.jar)

MapWriter{2.1.1} [MapWriter] (MapWriter-1.7.2-2.1.1-2.jar)

mca{4.0.1} [Minecraft Comes Alive] (mca.zip)

MiniBosses{v1.2 PRE} [Mini-Bosses] (Mini-Bosses_1_2_PRE.jar)

CustomSpawner{3.2.0.dev.R1} [DrZhark's CustomSpawner] (mob spawner.zip)

modularpots{1.7.2.13} [Modular Flower Pots] (ModularPots-1.7.2.13.jar)

MoCreatures{6.2.0.dev.R1} [DrZhark's Mo'Creatures Mod] (mos.zip)

plantmegapack{4.10} [Plant Mega Pack] (plantmegapack-4.10-1.7.2-1121.jar)

radixcore{1.2.0} [RadixCore] (RadixCore-1-2)

row{1.7.2-014.05.22-1} [Rails of War] (row-1.7.2-014.05.22-1.jar)

weaponmod{1.7.2 v1.14.2} [balkon's WeaponMod] (weaponmod-1.14.2.jar)

witchery{0.20.5} [Witchery] (witchery-1.7.2-0.20.5.jar)

Launched Version: 1.7.2-Forge10.12.2.1147

 

Dont use 1.7.2 there is literally no sane reason to. Use 1.7.10