I downloaded the latest version of Forge for Minecraft 1.6.2 and installed it using the installer, without modifying anything in the .jar file.

 

After the installation, I changed the profile to Forge and proceeded to start the game.

 

The launcher disappeared as usual but the game window never appeared. No mods were installed so I tried again, but the problem persisted.

The console showed this:

 

 

Initializing Frame

System.getProperty('os.name') == 'Windows 8'

System.getProperty('os.version') == '6.2'

System.getProperty('os.arch') == 'x86'

System.getProperty('java.version') == '1.7.0_17'

System.getProperty('java.vendor') == 'Oracle Corporation'

Loaded 2 profile(s); selected 'Forge'

News is up to date!

Delta time to compare resources: 5730 ms

Download job 'Resources' skipped as there are no files to download

Job 'Resources' finished successfully

Logging in with username

Getting syncinfo for selected version

Queueing library & version downloads

Download job 'Version & Libraries' started (8 threads, 23 files)

Finished downloading C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar for job 'Version & Libraries': Used own copy as it matched etag

Finished downloading C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\net\minecraft\launchwrapper\1.3\launchwrapper-1.3.jar for job 'Version & Libraries': Used own copy as it matched etag

Finished downloading C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput-platform\2.0.5\jinput-platform-2.0.5-natives-windows.jar for job 'Version & Libraries': Used own copy as it matched etag

Finished downloading C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar for job 'Version & Libraries': Used own copy as it matched etag

Finished downloading C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl-platform\2.9.0\lwjgl-platform-2.9.0-natives-windows.jar for job 'Version & Libraries': Used own copy as it matched etag

Finished downloading C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\net\minecraftforge\minecraftforge\9.10.0.790\minecraftforge-9.10.0.790.jar for job 'Version & Libraries': Used own copy as it matched etag

Finished downloading C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar for job 'Version & Libraries': Used own copy as it matched etag

Finished downloading C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar for job 'Version & Libraries': Used own copy as it matched etag

Finished downloading C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\org\ow2\asm\asm-all\4.1\asm-all-4.1.jar for job 'Version & Libraries': Used own copy as it matched etag

Finished downloading C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar for job 'Version & Libraries': Used own copy as it matched etag

Finished downloading C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar for job 'Version & Libraries': Used own copy as it matched etag

Finished downloading C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\argo\argo\2.25_fixed\argo-2.25_fixed.jar for job 'Version & Libraries': Used own copy as it matched etag

Finished downloading C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\lzma\lzma\0.0.1\lzma-0.0.1.jar for job 'Version & Libraries': Used own copy as it matched etag

Finished downloading C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar for job 'Version & Libraries': Used own copy as it matched etag

Finished downloading C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\14.0\guava-14.0.jar for job 'Version & Libraries': Used own copy as it matched etag

Finished downloading C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar for job 'Version & Libraries': Used own copy as it matched etag

Finished downloading C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.0\lwjgl-2.9.0.jar for job 'Version & Libraries': Used own copy as it matched etag

Finished downloading C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.2\gson-2.2.2.jar for job 'Version & Libraries': Used own copy as it matched etag

Finished downloading C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar for job 'Version & Libraries': Used own copy as it matched etag

Finished downloading C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar for job 'Version & Libraries': Used own copy as it matched etag

Finished downloading C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.0\lwjgl_util-2.9.0.jar for job 'Version & Libraries': Used own copy as it matched etag

Finished downloading C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\org\bouncycastle\bcprov-jdk15on\1.47\bcprov-jdk15on-1.47.jar for job 'Version & Libraries': Used own copy as it matched etag

Finished downloading C:\Users\jair0_000\AppData\Roaming\.minecraft\versions\1.6.2-Forge9.10.0.790\1.6.2-Forge9.10.0.790.jar for job 'Version & Libraries': Couldn't connect to server (responded with 403) but have local file, assuming it's good

Job 'Version & Libraries' finished successfully

Launching game

Looking for old natives to clean up...

Unpacking natives to C:\Users\jair0_000\AppData\Roaming\.minecraft\versions\1.6.2-Forge9.10.0.790\1.6.2-Forge9.10.0.790-natives-166887434721527

Launching in C:\Users\jair0_000\AppData\Roaming\.minecraft

Running C:\Program Files (x86)\Java\jre7\bin\javaw.exe -Xmx512M -Djava.library.path=C:\Users\jair0_000\AppData\Roaming\.minecraft\versions\1.6.2-Forge9.10.0.790\1.6.2-Forge9.10.0.790-natives-166887434721527 -cp C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\net\minecraftforge\minecraftforge\9.10.0.790\minecraftforge-9.10.0.790.jar;C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\net\minecraft\launchwrapper\1.3\launchwrapper-1.3.jar;C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\org\ow2\asm\asm-all\4.1\asm-all-4.1.jar;C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar;C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\lzma\lzma\0.0.1\lzma-0.0.1.jar;C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar;C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar;C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar;C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar;C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar;C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.0\lwjgl-2.9.0.jar;C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.0\lwjgl_util-2.9.0.jar;C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\argo\argo\2.25_fixed\argo-2.25_fixed.jar;C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\org\bouncycastle\bcprov-jdk15on\1.47\bcprov-jdk15on-1.47.jar;C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\14.0\guava-14.0.jar;C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar;C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar;C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar;C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar;C:\Users\jair0_000\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.2\gson-2.2.2.jar;C:\Users\jair0_000\AppData\Roaming\.minecraft\versions\1.6.2-Forge9.10.0.790\1.6.2-Forge9.10.0.790.jar net.minecraft.launchwrapper.Launch --username SelfishOcelot --session ${auth_session} --version 1.6.2-Forge9.10.0.790 --gameDir C:\Users\jair0_000\AppData\Roaming\.minecraft --assetsDir C:\Users\jair0_000\AppData\Roaming\.minecraft\assets --tweakClass cpw.mods.fml.common.launcher.FMLTweaker

---- YOU CAN CLOSE THIS LAUNCHER IF THE GAME STARTED OK ----

---- YOU CAN CLOSE THIS LAUNCHER IF THE GAME STARTED OK ----

---- YOU CAN CLOSE THIS LAUNCHER IF THE GAME STARTED OK ----

Client> ago 05, 2013 4:04:22 PM net.minecraft.launchwrapper.LogWrapper log

Client> INFO: Using tweak class name cpw.mods.fml.common.launcher.FMLTweaker

Client> 2013-08-05 16:04:22 [iNFO] [ForgeModLoader] Forge Mod Loader version 6.2.26.790 for Minecraft 1.6.2 loading

Client> 2013-08-05 16:04:22 [iNFO] [ForgeModLoader] Java is Java HotSpot Client VM, version 1.7.0_17, running on Windows 8:x86:6.2, installed at C:\Program Files (x86)\Java\jre7

Client> 2013-08-05 16:04:22 [iNFO] [sTDOUT] Loaded 39 rules from AccessTransformer config file fml_at.cfg

Client> 2013-08-05 16:04:22 [iNFO] [sTDOUT] Loaded 107 rules from AccessTransformer config file forge_at.cfg

Client> 2013-08-05 16:04:24 [iNFO] [ForgeModLoader] Found valid fingerprint for Minecraft Forge. Certificate fingerprint e3c3d50c7c986df74c645c0ac54639741c90a557

Client> 2013-08-05 16:04:24 [iNFO] [ForgeModLoader] Found valid fingerprint for Minecraft. Certificate fingerprint cd99959656f753dc28d863b46769f7f8fbaefcfc

Client> 2013-08-05 16:04:24 [iNFO] [ForgeModLoader] Launching wrapped minecraft

Client> 2013-08-05 16:04:24 [sEVERE] [ForgeModLoader] Unable to launch

Client> java.lang.reflect.InvocationTargetException

Client> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

Client> at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

Client> at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

Client> at java.lang.reflect.Method.invoke(Unknown Source)

Client> at net.minecraft.launchwrapper.Launch.launch(Launch.java:57)

Client> at net.minecraft.launchwrapper.Launch.main(Launch.java:18)

Client> Caused by: java.lang.NoSuchMethodError: net.minecraft.server.MinecraftServer.func_130071_aq()J

Client> at net.minecraft.client.Minecraft.<init>(Minecraft.java:179)

Client> at net.minecraft.client.main.Main.main(SourceFile:83)

Client> ... 6 more

Game ended with no troubles detected (exit code 0)

Deleting C:\Users\jair0_000\AppData\Roaming\.minecraft\versions\1.6.2-Forge9.10.0.790\1.6.2-Forge9.10.0.790-natives-166887434721527

Couldn't delete C:\Users\jair0_000\AppData\Roaming\.minecraft\versions\1.6.2-Forge9.10.0.790\1.6.2-Forge9.10.0.790-natives-166887434721527 - scheduling for deletion upon exit

 

 

I'm a noob with these things, this is my first post after all, but some things didn't seem right like deleting the file on the last line in the log, or skipping the download of the Job "Resources" or the line that said "Unable to launch

Client> java.lang.reflect.InvocationTargetException". I also noticed it said the game ended with no troubles, meaning it closes before it even starts. The game starts just fine without the Forge profile selected.

 

Please help, I cant find a fix. I already tried reinstalling Forge, deleting old mods.

Any help is welcomed.

 

Try updating to 804

Yep, that did it, thanks a lot, everything turned back to normal.