Minecraft Forums

for any minecraft forge i play this happens: it says already playing, and then switches to play button. there's no crash. it just doesnt work. Have others experienced this? i know i could just play FTB instead but that doesnt work either. Help!!! BTW this is from the console:

[17:31:44] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[17:31:44] [main/INFO] [LaunchWrapper]: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[17:31:44] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker
[17:31:44] [main/INFO] [FML]: Forge Mod Loader version 7.99.36.1558 for Minecraft 1.7.10 loading
[17:31:44] [main/INFO] [FML]: Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_31, running on Windows 8.1:amd64:6.3, installed at C:\Program Files\Java\jre1.8.0_31
[17:31:45] [main/WARN] [FML]: The coremod am2.preloader.AM2PreloaderContainer does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[17:31:45] [main/INFO] [ArsMagica2]: Core initializing...stand back! I'm going to try MAGIC!
[17:31:45] [main/INFO] [FML]: [AppEng] Core Init
[17:31:45] [main/WARN] [FML]: The coremod codechicken.core.launch.CodeChickenCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: java.lang.NoClassDefFoundError: argo/jdom/JsonNode
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at codechicken.core.launch.DepLoader.load(DepLoader.java:633)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at codechicken.core.launch.CodeChickenCorePlugin.<init>(CodeChickenCorePlugin.java:50)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at java.lang.reflect.Constructor.newInstance(Unknown Source)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at java.lang.Class.newInstance(Unknown Source)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at cpw.mods.fml.relauncher.CoreModManager.loadCoreMod(CoreModManager.java:501)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at cpw.mods.fml.relauncher.CoreModManager.discoverCoreMods(CoreModManager.java:389)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at cpw.mods.fml.relauncher.CoreModManager.handleLaunch(CoreModManager.java:221)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at cpw.mods.fml.relauncher.FMLLaunchHandler.setupHome(FMLLaunchHandler.java:90)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at cpw.mods.fml.relauncher.FMLLaunchHandler.setupClient(FMLLaunchHandler.java:67)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at cpw.mods.fml.relauncher.FMLLaunchHandler.configureForClientLaunch(FMLLaunchHandler.java:34)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at cpw.mods.fml.common.launcher.FMLTweaker.injectIntoClassLoader(FMLTweaker.java:126)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at net.minecraft.launchwrapper.Launch.launch(Launch.java:115)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: Caused by: java.lang.ClassNotFoundException: argo.jdom.JsonNode
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at java.net.URLClassLoader$1.run(Unknown Source)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at java.net.URLClassLoader$1.run(Unknown Source)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at java.security.AccessController.doPrivileged(Native Method)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at java.net.URLClassLoader.findClass(Unknown Source)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:117)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at java.lang.ClassLoader.loadClass(Unknown Source)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at java.lang.ClassLoader.loadClass(Unknown Source)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: ... 16 more
[17:31:46] [main/ERROR] [FML]: An error occurred trying to configure the minecraft home at C:\Users\rbw20_000\AppData\Roaming\.minecraft for Forge Mod Loader
java.lang.NoClassDefFoundError: argo/jdom/JsonNode
at codechicken.core.launch.DepLoader.load(DepLoader.java:633) ~[DepLoader.class:?]
at codechicken.core.launch.CodeChickenCorePlugin.<init>(CodeChickenCorePlugin.java:50) ~[CodeChickenCore_0.9.0.7.jar:?]
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_31]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_31]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_31]
at java.lang.reflect.Constructor.newInstance(Unknown Source) ~[?:1.8.0_31]
at java.lang.Class.newInstance(Unknown Source) ~[?:1.8.0_31]
at cpw.mods.fml.relauncher.CoreModManager.loadCoreMod(CoreModManager.java:501) ~[forge-1.7.10-10.13.4.1558-1.7.10.jar:?]
at cpw.mods.fml.relauncher.CoreModManager.discoverCoreMods(CoreModManager.java:389) ~[forge-1.7.10-10.13.4.1558-1.7.10.jar:?]
at cpw.mods.fml.relauncher.CoreModManager.handleLaunch(CoreModManager.java:221) ~[forge-1.7.10-10.13.4.1558-1.7.10.jar:?]
at cpw.mods.fml.relauncher.FMLLaunchHandler.setupHome(FMLLaunchHandler.java:90) [forge-1.7.10-10.13.4.1558-1.7.10.jar:?]
at cpw.mods.fml.relauncher.FMLLaunchHandler.setupClient(FMLLaunchHandler.java:67) [forge-1.7.10-10.13.4.1558-1.7.10.jar:?]
at cpw.mods.fml.relauncher.FMLLaunchHandler.configureForClientLaunch(FMLLaunchHandler.java:34) [forge-1.7.10-10.13.4.1558-1.7.10.jar:?]
at cpw.mods.fml.common.launcher.FMLTweaker.injectIntoClassLoader(FMLTweaker.java:126) [forge-1.7.10-10.13.4.1558-1.7.10.jar:?]
at net.minecraft.launchwrapper.Launch.launch(Launch.java:115) [launchwrapper-1.12.jar:?]
at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
Caused by: java.lang.ClassNotFoundException: argo.jdom.JsonNode
at java.net.URLClassLoader$1.run(Unknown Source) ~[?:1.8.0_31]
at java.net.URLClassLoader$1.run(Unknown Source) ~[?:1.8.0_31]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_31]
at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.8.0_31]
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:117) ~[launchwrapper-1.12.jar:?]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_31]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_31]
... 16 more
Exception in thread "main" [17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: java.lang.NoClassDefFoundError: argo/jdom/JsonNode
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at codechicken.core.launch.DepLoader.load(DepLoader.java:633)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at codechicken.core.launch.CodeChickenCorePlugin.<init>(CodeChickenCorePlugin.java:50)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at java.lang.reflect.Constructor.newInstance(Unknown Source)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at java.lang.Class.newInstance(Unknown Source)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at cpw.mods.fml.relauncher.CoreModManager.loadCoreMod(CoreModManager.java:501)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at cpw.mods.fml.relauncher.CoreModManager.discoverCoreMods(CoreModManager.java:389)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at cpw.mods.fml.relauncher.CoreModManager.handleLaunch(CoreModManager.java:221)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at cpw.mods.fml.relauncher.FMLLaunchHandler.setupHome(FMLLaunchHandler.java:90)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at cpw.mods.fml.relauncher.FMLLaunchHandler.setupClient(FMLLaunchHandler.java:67)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at cpw.mods.fml.relauncher.FMLLaunchHandler.configureForClientLaunch(FMLLaunchHandler.java:34)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at cpw.mods.fml.common.launcher.FMLTweaker.injectIntoClassLoader(FMLTweaker.java:126)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at net.minecraft.launchwrapper.Launch.launch(Launch.java:115)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: Caused by: java.lang.ClassNotFoundException: argo.jdom.JsonNode
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at java.net.URLClassLoader$1.run(Unknown Source)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at java.net.URLClassLoader$1.run(Unknown Source)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at java.security.AccessController.doPrivileged(Native Method)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at java.net.URLClassLoader.findClass(Unknown Source)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:117)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at java.lang.ClassLoader.loadClass(Unknown Source)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at java.lang.ClassLoader.loadClass(Unknown Source)
[17:31:46] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: ... 16 more

Can someone please tell me whats going on? P.S. im trying to load AM2 but it doesnt even get to load the mod

same result 5 times. it doesnt work if i repeat it.

I found the answer Warning. this is a video. just thought youd want to know