Minecraft Forums

This is a problem I only found recently, i've searched the internet for a while now, trying to find a fix, ive reinstalled the game, launcher, and forge, but i still get nothing, changing jre8 (java path), etc. Ive attempted to change it to jre7, but it doesn't help, and i face the same problem. My current java executable with default java: C:\Program Files\Minecraft\runtime\jre-x32\1.8.0_25\bin\javaw.exe, changing it to jre7: C:\Program Files\Minecraft\runtime\jre7\1.8.0_25\bin\javaw.exe. I have tried both of these without the 1.8.0_25 and I get the same results



tl;dr Ive reinstalled everything and did the jre8 to jre7 trick and minecraft still doesnt launch

Please define logs? As in theres the launcher log, error log (and if theres more,) etc.

I have the same problem. My version of forge is 1.7.2, and I only have one mod installed. There are no crash reports. Here is my launcher log:

[15:33:16 INFO]: Minecraft Launcher 1.6.61 (through bootstrap 100) started on windows...
[15:33:16 INFO]: Current time is Mar 7, 2016 3:33:16 PM
[15:33:16 INFO]: System.getProperty('os.name') == 'Windows 10'
[15:33:16 INFO]: System.getProperty('os.version') == '10.0'
[15:33:16 INFO]: System.getProperty('os.arch') == 'amd64'
[15:33:16 INFO]: System.getProperty('java.version') == '1.8.0_25'
[15:33:16 INFO]: System.getProperty('java.vendor') == 'Oracle Corporation'
[15:33:16 INFO]: System.getProperty('sun.arch.data.model') == '64'
[15:33:16 INFO]: proxy == DIRECT
[15:33:16 INFO]: JFX is already initialized
[15:33:17 INFO]: Refreshing local version list...
[15:33:17 INFO]: Refreshing remote version list...
[15:33:18 INFO]: Refresh complete.
[15:33:18 INFO]: Loaded 5 profile(s); selected 'Forge'
[15:33:18 INFO]: Refreshing auth...
[15:33:18 INFO]: Logging in with access token
[15:33:21 INFO]: Getting syncinfo for selected version
[15:33:21 INFO]: Queueing library & version downloads
[15:33:21 INFO]: Download job 'Version & Libraries' started (16 threads, 27 files)
[15:33:21 INFO]: Attempting to download C:\Users\David\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.4\gson-2.2.4.jar for job 'Version & Libraries'... (try 0)
[15:33:21 INFO]: Attempting to download C:\Users\David\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.0\lwjgl-2.9.0.jar for job 'Version & Libraries'... (try 0)
[15:33:21 INFO]: Attempting to download C:\Users\David\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)
[15:33:21 INFO]: Attempting to download C:\Users\David\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar for job 'Version & Libraries'... (try 0)
[15:33:21 INFO]: Attempting to download C:\Users\David\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)
[15:33:21 INFO]: Attempting to download C:\Users\David\AppData\Roaming\.minecraft\libraries\org\ow2\asm\asm-all\4.1\asm-all-4.1.jar for job 'Version & Libraries'... (try 0)
[15:33:21 INFO]: Attempting to download C:\Users\David\AppData\Roaming\.minecraft\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar for job 'Version & Libraries'... (try 0)
[15:33:21 INFO]: Attempting to download C:\Users\David\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar for job 'Version & Libraries'... (try 0)
[15:33:21 INFO]: Attempting to download C:\Users\David\AppData\Roaming\.minecraft\libraries\com\mojang\authlib\1.3\authlib-1.3.jar for job 'Version & Libraries'... (try 0)
[15:33:21 INFO]: Attempting to download C:\Users\David\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar for job 'Version & Libraries'... (try 0)
[15:33:21 INFO]: Attempting to download C:\Users\David\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)
[15:33:21 INFO]: Attempting to download C:\Users\David\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar for job 'Version & Libraries'... (try 0)
[15:33:21 INFO]: Attempting to download C:\Users\David\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.0\lwjgl_util-2.9.0.jar for job 'Version & Libraries'... (try 0)
[15:33:21 INFO]: Attempting to download C:\Users\David\AppData\Roaming\.minecraft\libraries\net\sf\trove4j\trove4j\3.0.3\trove4j-3.0.3.jar for job 'Version & Libraries'... (try 0)
[15:33:21 INFO]: Attempting to download C:\Users\David\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar for job 'Version & Libraries'... (try 0)
[15:33:21 INFO]: Attempting to download C:\Users\David\AppData\Roaming\.minecraft\libraries\lzma\lzma\0.0.1\lzma-0.0.1.jar for job 'Version & Libraries'... (try 0)
[15:33:22 INFO]: Download job 'Resources' skipped as there are no files to download
[15:33:22 INFO]: Job 'Resources' finished successfully (took 0:00:00.000)
[15:33:22 INFO]: Finished downloading C:\Users\David\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
[15:33:22 INFO]: Attempting to download C:\Users\David\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar for job 'Version & Libraries'... (try 0)
[15:33:22 INFO]: Finished downloading C:\Users\David\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
[15:33:22 INFO]: Attempting to download C:\Users\David\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)
[15:33:22 INFO]: Finished downloading C:\Users\David\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
[15:33:22 INFO]: Attempting to download C:\Users\David\AppData\Roaming\.minecraft\libraries\net\minecraft\launchwrapper\1.9\launchwrapper-1.9.jar for job 'Version & Libraries'... (try 0)
[15:33:22 INFO]: Finished downloading C:\Users\David\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
[15:33:22 INFO]: Attempting to download C:\Users\David\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar for job 'Version & Libraries'... (try 0)
[15:33:22 INFO]: Finished downloading C:\Users\David\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
[15:33:22 INFO]: Attempting to download C:\Users\David\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\15.0\guava-15.0.jar for job 'Version & Libraries'... (try 0)
[15:33:22 INFO]: Finished downloading C:\Users\David\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar for job 'Version & Libraries': Local file matches local checksum, using that
[15:33:22 INFO]: Attempting to download C:\Users\David\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar for job 'Version & Libraries'... (try 0)
[15:33:22 INFO]: Finished downloading C:\Users\David\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
[15:33:22 INFO]: Attempting to download C:\Users\David\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar for job 'Version & Libraries'... (try 0)
[15:33:22 INFO]: Finished downloading C:\Users\David\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
[15:33:22 INFO]: Attempting to download C:\Users\David\AppData\Roaming\.minecraft\libraries\java3d\vecmath\1.3.1\vecmath-1.3.1.jar for job 'Version & Libraries'... (try 0)
[15:33:22 INFO]: Finished downloading C:\Users\David\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
[15:33:22 INFO]: Attempting to download C:\Users\David\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar for job 'Version & Libraries'... (try 0)
[15:33:22 INFO]: Finished downloading C:\Users\David\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
[15:33:22 INFO]: Attempting to download C:\Users\David\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)
[15:33:22 INFO]: Finished downloading C:\Users\David\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
[15:33:22 INFO]: Attempting to download C:\Users\David\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.2.1121\1.7.2-Forge10.12.2.1121.jar for job 'Version & Libraries'... (try 0)
[15:33:22 INFO]: Finished downloading C:\Users\David\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
[15:33:22 INFO]: Finished downloading C:\Users\David\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
[15:33:22 INFO]: Finished downloading C:\Users\David\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
[15:33:22 INFO]: Finished downloading C:\Users\David\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar for job 'Version & Libraries': Local file matches local checksum, using that
[15:33:22 INFO]: Finished downloading C:\Users\David\AppData\Roaming\.minecraft\libraries\net\minecraft\launchwrapper\1.9\launchwrapper-1.9.jar for job 'Version & Libraries': Local file matches local checksum, using that
[15:33:22 INFO]: Finished downloading C:\Users\David\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
[15:33:22 INFO]: Finished downloading C:\Users\David\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar for job 'Version & Libraries': Local file matches local checksum, using that
[15:33:22 INFO]: Finished downloading C:\Users\David\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
[15:33:22 INFO]: Finished downloading C:\Users\David\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar for job 'Version & Libraries': Local file matches local checksum, using that
[15:33:22 INFO]: Finished downloading C:\Users\David\AppData\Roaming\.minecraft\libraries\com\mojang\authlib\1.3\authlib-1.3.jar for job 'Version & Libraries': Local file matches local checksum, using that
[15:33:22 INFO]: Finished downloading C:\Users\David\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar for job 'Version & Libraries': Local file matches local checksum, using that
[15:33:22 INFO]: Finished downloading C:\Users\David\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
[15:33:22 INFO]: Finished downloading C:\Users\David\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
[15:33:22 INFO]: Finished downloading C:\Users\David\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
[15:33:22 INFO]: Finished downloading C:\Users\David\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
[15:33:22 INFO]: Finished downloading C:\Users\David\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.2.1121\1.7.2-Forge10.12.2.1121.jar for job 'Version & Libraries': Couldn't connect to server (responded with 403) but have local file, assuming it's good
[15:33:22 INFO]: Job 'Version & Libraries' finished successfully (took 0:00:01.120)
[15:33:22 INFO]: Launching game
[15:33:22 INFO]: Unpacking natives to C:\Users\David\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.2.1121\1.7.2-Forge10.12.2.1121-natives-87125627632125
[15:33:23 INFO]: Reconstructing virtual assets folder at C:\Users\David\AppData\Roaming\.minecraft\assets\virtual\legacy
[15:33:23 INFO]: Launching in C:\Users\David\AppData\Roaming\.minecraft
[15:33:23 INFO]: Half command: C:\Program Files (x86)\Minecraft\runtime\jre-x64\1.8.0_25\bin\javaw.exe -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M -Dos.name=Windows 10 -Dos.version=10.0 -Djava.library.path=C:\Users\David\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.2.1121\1.7.2-Forge10.12.2.1121-natives-87125627632125 -cp C:\Users\David\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\David\AppData\Roaming\.minecraft\libraries\net\minecraft\launchwrapper\1.9\launchwrapper-1.9.jar;C:\Users\David\AppData\Roaming\.minecraft\libraries\org\ow2\asm\asm-all\4.1\asm-all-4.1.jar;C:\Users\David\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-library\2.10.2\scala-library-2.10.2.jar;C:\Users\David\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-compiler\2.10.2\scala-compiler-2.10.2.jar;C:\Users\David\AppData\Roaming\.minecraft\libraries\java3d\vecmath\1.3.1\vecmath-1.3.1.jar;C:\Users\David\AppData\Roaming\.minecraft\libraries\net\sf\trove4j\trove4j\3.0.3\trove4j-3.0.3.jar;C:\Users\David\AppData\Roaming\.minecraft\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar;C:\Users\David\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar;C:\Users\David\AppData\Roaming\.minecraft\libraries\lzma\lzma\0.0.1\lzma-0.0.1.jar;C:\Users\David\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar;C:\Users\David\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar;C:\Users\David\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar;C:\Users\David\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar;C:\Users\David\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar;C:\Users\David\AppData\Roaming\.minecraft\libraries\io\netty\netty-all\4.0.10.Final\netty-all-4.0.10.Final.jar;C:\Users\David\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\15.0\guava-15.0.jar;C:\Users\David\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar;C:\Users\David\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar;C:\Users\David\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar;C:\Users\David\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar;C:\Users\David\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.4\gson-2.2.4.jar;C:\Users\David\AppData\Roaming\.minecraft\libraries\com\mojang\authlib\1.3\authlib-1.3.jar;C:\Users\David\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-api\2.0-beta9\log4j-api-2.0-beta9.jar;C:\Users\David\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-core\2.0-beta9\log4j-core-2.0-beta9.jar;C:\Users\David\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.0\lwjgl-2.9.0.jar;C:\Users\David\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.0\lwjgl_util-2.9.0.jar;C:\Users\David\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.2.1121\1.7.2-Forge10.12.2.1121.jar net.minecraft.launchwrapper.Launch
[15:33:23 INFO]: Looking for orphaned versions to clean up...
[15:33:24 INFO]: Looking for old natives & assets to clean up...
[15:33:25 INFO]: Game ended with no troubles detected (exit code 0)
[15:33:25 INFO]: Deleting C:\Users\David\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.2.1121\1.7.2-Forge10.12.2.1121-natives-87125627632125

Also, if this helps, here's my game output log:

[15:33:25] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[15:33:25] [main/INFO] [LaunchWrapper]: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[15:33:25] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker
[15:33:25] [main/INFO] [FML]: Forge Mod Loader version 7.2.211.1121 for Minecraft 1.7.2 loading
[15:33:25] [main/INFO] [FML]: Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_25, running on Windows 10:amd64:10.0, installed at C:\Program Files (x86)\Minecraft\runtime\jre-x64\1.8.0_25
[15:33:25] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
[15:33:25] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker
[15:33:25] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
[15:33:25] [main/ERROR] [LaunchWrapper]: Unable to launch
java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901) ~[?:1.8.0_25]
at java.util.ArrayList$Itr.remove(ArrayList.java:865) ~[?:1.8.0_25]
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:?]
Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release

CreeperReaper238 One of your last lines are

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

You seem to be attempting to load minecraft version 1.9 with forge 1.7.2. Firstly forge 1.7.2 is quite outdated so make sure you install and use forge 1.7.10 instead. Then just set up the minecraft launcher to launch minecraft 1.7.10 instead of 1.9 and everything should work.

IF you really want to use forge 1.7.2 set your game version to minecraft 1.7.2, but most mods are for 1.7.10 so update it!

I am using (or at least it says I am) 1.7.2 minecraft and my mod says it's for minecraft 1.7.2. maybe there's another version of the mod... either way, I'm using the right versions and stuff. For the 1.9 update, did it override my 1.7.2 profile?

Hey, Mr. RedstoneWizard22, I took your advice and got a newer version mod(1.7.10) and it worked! The mod I got is Parzi's Star Wars Mod by the way, I you want to know. Anyway, thanks!!!!

Glad I could help