Forge 1.7.2 Simply will not start

[Guest]

Here is my issue:  When trying to run 1.6.4, forge runs smoothly.  No mods, just a test version.  When I try to update to 1.7.2, it will run through the launcher and then nothing happens.  I've tried clean installs, tried going online for fixes, found nothing.  This is my last resort.

 

 

 

 

[19:35:24] [main/INFO] [FML/]: Forge Mod Loader version 7.2.190.1075 for Minecraft 1.7.2 loading

[19:35:24] [main/INFO] [FML/]: Java is Java HotSpot 64-Bit Server VM, version 1.8.0_20-ea, running on Windows 8:amd64:6.2, installed at C:\Program Files\Java\jre8

[19:35:24] [main/DEBUG] [FML/]: Java classpath at launch is C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\net\minecraftforge\forge\1.7.2-10.12.1.1075\forge-1.7.2-10.12.1.1075.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\net\minecraft\launchwrapper\1.9\launchwrapper-1.9.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\org\ow2\asm\asm-all\4.1\asm-all-4.1.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-library\2.10.2\scala-library-2.10.2.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-compiler\2.10.2\scala-compiler-2.10.2.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\java3d\vecmath\1.3.1\vecmath-1.3.1.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\net\sf\trove4j\trove4j\3.0.3\trove4j-3.0.3.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\lzma\lzma\0.0.1\lzma-0.0.1.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\io\netty\netty-all\4.0.10.Final\netty-all-4.0.10.Final.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\15.0\guava-15.0.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.4\gson-2.2.4.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\com\mojang\authlib\1.3\authlib-1.3.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-api\2.0-beta9\log4j-api-2.0-beta9.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-core\2.0-beta9\log4j-core-2.0-beta9.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.0\lwjgl-2.9.0.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.0\lwjgl_util-2.9.0.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.1.1075\1.7.2-Forge10.12.1.1075.jar

[19:35:24] [main/DEBUG] [FML/]: Java library path at launch is C:\Users\DaBiggman\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.1.1075\1.7.2-Forge10.12.1.1075-natives-186925702020

[19:35:24] [main/DEBUG] [FML/]: Enabling runtime deobfuscation

[19:35:24] [main/DEBUG] [FML/]: Instantiating coremod class FMLCorePlugin

[19:35:24] [main/DEBUG] [FML/]: Added access transformer class cpw.mods.fml.common.asm.transformers.AccessTransformer to enqueued access transformers

[19:35:24] [main/DEBUG] [FML/]: Enqueued coremod FMLCorePlugin

[19:35:24] [main/DEBUG] [FML/]: Instantiating coremod class FMLForgePlugin

[19:35:24] [main/DEBUG] [FML/]: Added access transformer class net.minecraftforge.transformers.ForgeAccessTransformer to enqueued access transformers

[19:35:24] [main/DEBUG] [FML/]: Enqueued coremod FMLForgePlugin

[19:35:24] [main/DEBUG] [FML/]: All fundamental core mods are successfully located

[19:35:24] [main/DEBUG] [FML/]: Discovering coremods

[19:35:24] [main/INFO] [LaunchWrapper/]: Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

[19:35:24] [main/INFO] [LaunchWrapper/]: Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker

[19:35:24] [main/INFO] [LaunchWrapper/]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

[19:35:24] [main/ERROR] [LaunchWrapper/]: Unable to launch

java.util.ConcurrentModificationException

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

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

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:?]

 

 

[LexManos]

Kill your mods folder, something in there is killing the startup.

[Guest]

I killed everything, this was all off a fresh install.

Regardless, deleted mods folder and this time when I tried to run it, the launcher just stopped working.  Is it an issue with Java 8?

 

 

[22:49:26] [main/INFO] [FML/]: Forge Mod Loader version 7.2.190.1075 for Minecraft 1.7.2 loading

[22:49:26] [main/INFO] [FML/]: Java is Java HotSpot 64-Bit Server VM, version 1.8.0_20-ea, running on Windows 8:amd64:6.2, installed at C:\Program Files\Java\jre8

[22:49:26] [main/DEBUG] [FML/]: Java classpath at launch is C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\net\minecraftforge\forge\1.7.2-10.12.1.1075\forge-1.7.2-10.12.1.1075.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\net\minecraft\launchwrapper\1.9\launchwrapper-1.9.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\org\ow2\asm\asm-all\4.1\asm-all-4.1.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-library\2.10.2\scala-library-2.10.2.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-compiler\2.10.2\scala-compiler-2.10.2.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\java3d\vecmath\1.3.1\vecmath-1.3.1.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\net\sf\trove4j\trove4j\3.0.3\trove4j-3.0.3.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\lzma\lzma\0.0.1\lzma-0.0.1.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\io\netty\netty-all\4.0.10.Final\netty-all-4.0.10.Final.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\15.0\guava-15.0.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.4\gson-2.2.4.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\com\mojang\authlib\1.3\authlib-1.3.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-api\2.0-beta9\log4j-api-2.0-beta9.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-core\2.0-beta9\log4j-core-2.0-beta9.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.0\lwjgl-2.9.0.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.0\lwjgl_util-2.9.0.jar;C:\Users\DaBiggman\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.1.1075\1.7.2-Forge10.12.1.1075.jar

[22:49:26] [main/DEBUG] [FML/]: Java library path at launch is C:\Users\DaBiggman\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.1.1075\1.7.2-Forge10.12.1.1075-natives-11829144292262

[22:49:26] [main/DEBUG] [FML/]: Enabling runtime deobfuscation

[22:49:26] [main/DEBUG] [FML/]: Instantiating coremod class FMLCorePlugin

[22:49:26] [main/DEBUG] [FML/]: Added access transformer class cpw.mods.fml.common.asm.transformers.AccessTransformer to enqueued access transformers

[22:49:26] [main/DEBUG] [FML/]: Enqueued coremod FMLCorePlugin

[22:49:26] [main/DEBUG] [FML/]: Instantiating coremod class FMLForgePlugin

[22:49:26] [main/DEBUG] [FML/]: Added access transformer class net.minecraftforge.transformers.ForgeAccessTransformer to enqueued access transformers

[22:49:26] [main/DEBUG] [FML/]: Enqueued coremod FMLForgePlugin

[22:49:26] [main/DEBUG] [FML/]: All fundamental core mods are successfully located

[22:49:26] [main/DEBUG] [FML/]: Discovering coremods

[22:49:26] [main/INFO] [LaunchWrapper/]: Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

[22:49:26] [main/INFO] [LaunchWrapper/]: Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker

[22:49:26] [main/INFO] [LaunchWrapper/]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

[22:49:26] [main/ERROR] [LaunchWrapper/]: Unable to launch

java.util.ConcurrentModificationException

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

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

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:?]

 

[SanAndreaP]

[19:35:24] [main/INFO] [FML/]: Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_20-ea, running on Windows 8:amd64:6.2, installed at C:\Program Files\Java\jre8

 

I see you have Java 8 installed. Try Java 7 and see if it works. As I've heard, there are still some problems with Java 8.

[Guest]

Confirmed, it is Java 8 that is causing the issue.

 

Rolledback Java to 7.55 and it worked like a charm