Minecraft forge 1.7.2 wont run minecraft 1.7.2 runs well

[Mazkirin]

So its like this: it was everything all right until one day my minecraft 1.7.2 forge stopped working. I tried to reinstall, i tried to use forge 1.7.10 doesnt work to(so the problem is with all the forge versions probably) and i tried everything. doesnt work. For you to understand better the minecraft opens, but when i click the play it wont run the minecraft forge 1.7.2. I tried to run the 1.7.2 normal version and it works. Here is the development console log:

 

[20:14:52 INFO]: Launcher 3.4 started on windows...

[20:14:52 INFO]: Current time is Aug 26, 2014 8:14:52 PM

[20:14:52 INFO]: System.getProperty('os.name') == 'Windows 8.1'

[20:14:52 INFO]: System.getProperty('os.version') == '6.3'

[20:14:52 INFO]: System.getProperty('os.arch') == 'amd64'

[20:14:52 INFO]: System.getProperty('java.version') == '1.8.0_20'

[20:14:52 INFO]: System.getProperty('java.vendor') == 'Oracle Corporation'

[20:14:52 INFO]: System.getProperty('sun.arch.data.model') == '64'

[20:14:52 INFO]: JFX is already initialized

[20:14:53 INFO]: Refreshing local version list...

[20:14:53 INFO]: Refreshing remote version list...

[20:14:54 INFO]: News is up to date!

[20:14:54 INFO]: Refresh complete.

[20:14:55 INFO]: Loaded 2 profile(s); selected 'Forge'

[20:15:02 INFO]: Getting syncinfo for selected version

[20:15:02 INFO]: Queueing library & version downloads

[20:15:02 INFO]: Download job 'Version & Libraries' started (16 threads, 27 files)

[20:15:02 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar for job 'Version & Libraries'... (try 0)

[20:15:02 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar for job 'Version & Libraries'... (try 0)

[20:15:02 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar for job 'Version & Libraries'... (try 0)

[20:15:02 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\org\ow2\asm\asm-all\4.1\asm-all-4.1.jar for job 'Version & Libraries'... (try 0)

[20:15:02 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\net\minecraft\launchwrapper\1.9\launchwrapper-1.9.jar for job 'Version & Libraries'... (try 0)

[20:15:02 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar for job 'Version & Libraries'... (try 0)

[20:15:02 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar for job 'Version & Libraries'... (try 0)

[20:15:02 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-core\2.0-beta9\log4j-core-2.0-beta9.jar for job 'Version & Libraries'... (try 0)

[20:15:02 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar for job 'Version & Libraries'... (try 0)

[20:15:02 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar for job 'Version & Libraries'... (try 0)

[20:15:02 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.4\gson-2.2.4.jar for job 'Version & Libraries'... (try 0)

[20:15:02 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput-platform\2.0.5\jinput-platform-2.0.5-natives-windows.jar for job 'Version & Libraries'... (try 0)

[20:15:02 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.0\lwjgl_util-2.9.0.jar for job 'Version & Libraries'... (try 0)

[20:15:02 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\mojang\authlib\1.3\authlib-1.3.jar for job 'Version & Libraries'... (try 0)

[20:15:02 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\lzma\lzma\0.0.1\lzma-0.0.1.jar for job 'Version & Libraries'... (try 0)

[20:15:02 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\io\netty\netty-all\4.0.10.Final\netty-all-4.0.10.Final.jar for job 'Version & Libraries'... (try 0)

[20:15:07 INFO]: Download job 'Resources' skipped as there are no files to download

[20:15:07 INFO]: Job 'Resources' finished successfully (took 0:00:00.000)

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\io\netty\netty-all\4.0.10.Final\netty-all-4.0.10.Final.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:07 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar for job 'Version & Libraries'... (try 0)

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:07 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\net\sf\trove4j\trove4j\3.0.3\trove4j-3.0.3.jar for job 'Version & Libraries'... (try 0)

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:07 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar for job 'Version & Libraries'... (try 0)

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:07 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar for job 'Version & Libraries'... (try 0)

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\net\sf\trove4j\trove4j\3.0.3\trove4j-3.0.3.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:07 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar for job 'Version & Libraries'... (try 0)

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\lzma\lzma\0.0.1\lzma-0.0.1.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:07 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl-platform\2.9.0\lwjgl-platform-2.9.0-natives-windows.jar for job 'Version & Libraries'... (try 0)

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:07 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\15.0\guava-15.0.jar for job 'Version & Libraries'... (try 0)

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl-platform\2.9.0\lwjgl-platform-2.9.0-natives-windows.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:07 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.0\lwjgl-2.9.0.jar for job 'Version & Libraries'... (try 0)

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.0\lwjgl-2.9.0.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:07 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-api\2.0-beta9\log4j-api-2.0-beta9.jar for job 'Version & Libraries'... (try 0)

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-api\2.0-beta9\log4j-api-2.0-beta9.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:07 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\java3d\vecmath\1.3.1\vecmath-1.3.1.jar for job 'Version & Libraries'... (try 0)

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\java3d\vecmath\1.3.1\vecmath-1.3.1.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:07 INFO]: Attempting to download C:\Users\Zé Diogo\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.2.1147\1.7.2-Forge10.12.2.1147.jar for job 'Version & Libraries'... (try 0)

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.0\lwjgl_util-2.9.0.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\mojang\authlib\1.3\authlib-1.3.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput-platform\2.0.5\jinput-platform-2.0.5-natives-windows.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.4\gson-2.2.4.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-core\2.0-beta9\log4j-core-2.0-beta9.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\org\ow2\asm\asm-all\4.1\asm-all-4.1.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\net\minecraft\launchwrapper\1.9\launchwrapper-1.9.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:07 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\15.0\guava-15.0.jar for job 'Version & Libraries': Local file matches local checksum, using that

[20:15:08 INFO]: Finished downloading C:\Users\Zé Diogo\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.2.1147\1.7.2-Forge10.12.2.1147.jar for job 'Version & Libraries': Couldn't connect to server (responded with 403) but have local file, assuming it's good

[20:15:08 INFO]: Job 'Version & Libraries' finished successfully (took 0:00:05.815)

[20:15:08 INFO]: Launching game

[20:15:08 INFO]: Unpacking natives to C:\Users\Zé Diogo\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.2.1147\1.7.2-Forge10.12.2.1147-natives-186560914909350

[20:15:08 INFO]: Reconstructing virtual assets folder at C:\Users\Zé Diogo\AppData\Roaming\.minecraft\assets\virtual\legacy

[20:15:08 INFO]: Launching in C:\Users\Zé Diogo\AppData\Roaming\.minecraft

[20:15:08 INFO]: Half command: C:\Program Files\Java\jre1.8.0_20\bin\javaw.exe -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -Djava.library.path=C:\Users\Zé Diogo\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.2.1147\1.7.2-Forge10.12.2.1147-natives-186560914909350 -cp C:\Users\Zé Diogo\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\Zé Diogo\AppData\Roaming\.minecraft\libraries\net\minecraft\launchwrapper\1.9\launchwrapper-1.9.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\org\ow2\asm\asm-all\4.1\asm-all-4.1.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-library\2.10.2\scala-library-2.10.2.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-compiler\2.10.2\scala-compiler-2.10.2.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\java3d\vecmath\1.3.1\vecmath-1.3.1.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\net\sf\trove4j\trove4j\3.0.3\trove4j-3.0.3.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\lzma\lzma\0.0.1\lzma-0.0.1.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\io\netty\netty-all\4.0.10.Final\netty-all-4.0.10.Final.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\15.0\guava-15.0.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.4\gson-2.2.4.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\com\mojang\authlib\1.3\authlib-1.3.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-api\2.0-beta9\log4j-api-2.0-beta9.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-core\2.0-beta9\log4j-core-2.0-beta9.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.0\lwjgl-2.9.0.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.0\lwjgl_util-2.9.0.jar;C:\Users\Zé Diogo\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.2.1147\1.7.2-Forge10.12.2.1147.jar net.minecraft.launchwrapper.Launch

[20:15:08 INFO]: Looking for orphaned versions to clean up...

[20:15:10 INFO]: Looking for old natives & assets to clean up...

[20:15:12 INFO]: Client> [20:15:12] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker

[20:15:13 INFO]: Client> [20:15:12] [main/INFO] [LaunchWrapper]: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker

[20:15:13 INFO]: Client> [20:15:12] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker

[20:15:13 INFO]: Client> [20:15:12] [main/INFO] [FML]: Forge Mod Loader version 7.2.217.1147 for Minecraft 1.7.2 loading

[20:15:13 INFO]: Client> [20:15:13] [main/INFO] [FML]: Java is Java HotSpot 64-Bit Server VM, version 1.8.0_20, running on Windows 8.1:amd64:6.3, installed at C:\Program Files\Java\jre1.8.0_20

[20:15:13 INFO]: Client> [20:15:13] [main/WARN] [FML]: The coremod assets.levelup.LevelUpPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft

[20:15:13 INFO]: Client> [20:15:13] [main/WARN] [FML]: The coremod newdungeons.DungeonsPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft

[20:15:13 INFO]: Client> [20:15:13] [main/INFO] [FML]: Loading tweaker optifine.OptiFineForgeTweaker from OptiFine_1.7.2_HD_D1.jar

[20:15:13 INFO]: Client> [20:15:13] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

[20:15:13 INFO]: Client> [20:15:13] [main/INFO] [LaunchWrapper]: Loading tweak class name optifine.OptiFineForgeTweaker

[20:15:13 INFO]: Client> [20:15:13] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker

[20:15:13 INFO]: Client> [20:15:13] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

[20:15:13 INFO]: Client> [20:15:13] [main/ERROR] [LaunchWrapper]: Unable to launch

[20:15:13 INFO]: Client> java.util.ConcurrentModificationException

[20:15:13 INFO]: Client> at java.util.ArrayList$Itr.checkForComodification(Unknown Source) ~[?:1.8.0_20]

[20:15:13 INFO]: Client> at java.util.ArrayList$Itr.remove(Unknown Source) ~[?:1.8.0_20]

[20:15:13 INFO]: Client> at net.minecraft.launchwrapper.Launch.launch(Launch.java:117) [launchwrapper-1.9.jar:?]

[20:15:13 INFO]: Client> at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.9.jar:?]

[20:15:13 INFO]: Game ended with no troubles detected (exit code 0)

[20:15:13 INFO]: Deleting C:\Users\Zé Diogo\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.2.1147\1.7.2-Forge10.12.2.1147-natives-186560914909350

 

 

As you can see on this short part of the log

[20:15:13 INFO]: Client> [20:15:13] [main/ERROR] [LaunchWrapper]: Unable to launch

[20:15:13 INFO]: Client> java.util.ConcurrentModificationException

[20:15:13 INFO]: Client> at java.util.ArrayList$Itr.checkForComodification(Unknown Source) ~[?:1.8.0_20]

[20:15:13 INFO]: Client> at java.util.ArrayList$Itr.remove(Unknown Source) ~[?:1.8.0_20]

[20:15:13 INFO]: Client> at net.minecraft.launchwrapper.Launch.launch(Launch.java:117) [launchwrapper-1.9.jar:?]

[20:15:13 INFO]: Client> at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.9.jar:?]

[20:15:13 INFO]: Game ended with no troubles detected (exit code 0)

[20:15:13 INFO]: Deleting C:\Users\Zé Diogo\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.2.1147\1.7.2-Forge10.12.2.1147-natives-186560914909350

the log says it was unable to launch and then it deleted my files(altough they are still there). So what could be the problem? Thanks for you time and please help. If needed something tell me. Teamextreme launcher by the way

[Eternaldoom]

Forge doesn't work with Java 8 update 20. Downgrade to update 11.

[Mazkirin]

So the problem is my java version? Thanks guys i will try and then report again thanks

[Mazkirin]

Sorry for asking but how can i downgrade the java 8 update 11 isnt on the java.com

[Mazkirin]

Thanks guys i was really get preocupated

[Mazkirin]

It worked