[18:09:30] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[18:09:30] [main/INFO] [LaunchWrapper]: Using primary tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[18:09:30] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLTweaker
[18:09:30] [main/INFO] [FML]: Forge Mod Loader version 11.14.4.1577 for Minecraft 1.8 loading
[18:09:30] [main/INFO] [FML]: Java is Java HotSpot(TM) Client VM, version 1.8.0_111, running on Windows 10:x86:10.0, installed at C:\Program Files (x86)\Java\jre1.8.0_111
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: java.lang.NoClassDefFoundError: cpw/mods/fml/relauncher/IFMLLoadingPlugin
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.lang.ClassLoader.defineClass1(Native Method)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.lang.ClassLoader.defineClass(Unknown Source)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.security.SecureClassLoader.defineClass(Unknown Source)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.net.URLClassLoader.defineClass(Unknown Source)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.net.URLClassLoader.access$100(Unknown Source)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.net.URLClassLoader$1.run(Unknown Source)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.net.URLClassLoader$1.run(Unknown Source)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.security.AccessController.doPrivileged(Native Method)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.net.URLClassLoader.findClass(Unknown Source)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:117)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.lang.ClassLoader.loadClass(Unknown Source)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.lang.ClassLoader.loadClass(Unknown Source)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.lang.Class.forName0(Native Method)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.lang.Class.forName(Unknown Source)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at net.minecraftforge.fml.relauncher.CoreModManager.loadCoreMod(CoreModManager.java:485)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at net.minecraftforge.fml.relauncher.CoreModManager.discoverCoreMods(CoreModManager.java:409)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at net.minecraftforge.fml.relauncher.CoreModManager.handleLaunch(CoreModManager.java:241)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at net.minecraftforge.fml.relauncher.FMLLaunchHandler.setupHome(FMLLaunchHandler.java:95)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at net.minecraftforge.fml.relauncher.FMLLaunchHandler.setupClient(FMLLaunchHandler.java:72)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at net.minecraftforge.fml.relauncher.FMLLaunchHandler.configureForClientLaunch(FMLLaunchHandler.java:34)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at net.minecraftforge.fml.common.launcher.FMLTweaker.injectIntoClassLoader(FMLTweaker.java:119)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at net.minecraft.launchwrapper.Launch.launch(Launch.java:115)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: Caused by: java.lang.ClassNotFoundException: cpw.mods.fml.relauncher.IFMLLoadingPlugin
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.lang.ClassLoader.loadClass(Unknown Source)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.lang.ClassLoader.loadClass(Unknown Source)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  ... 23 more
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: Caused by: java.lang.NullPointerException
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  ... 25 more
[18:09:30] [main/ERROR] [FML]: An error occurred trying to configure the minecraft home at C:\Users\USER\AppData\Roaming\.minecraft for Forge Mod Loader
java.lang.NoClassDefFoundError: cpw/mods/fml/relauncher/IFMLLoadingPlugin
 at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_111]
 at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.8.0_111]
 at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.8.0_111]
 at java.net.URLClassLoader.defineClass(Unknown Source) ~[?:1.8.0_111]
 at java.net.URLClassLoader.access$100(Unknown Source) ~[?:1.8.0_111]
 at java.net.URLClassLoader$1.run(Unknown Source) ~[?:1.8.0_111]
 at java.net.URLClassLoader$1.run(Unknown Source) ~[?:1.8.0_111]
 at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_111]
 at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.8.0_111]
 at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:117) ~[launchwrapper-1.12.jar:?]
 at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_111]
 at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_111]
 at java.lang.Class.forName0(Native Method) ~[?:1.8.0_111]
 at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_111]
 at net.minecraftforge.fml.relauncher.CoreModManager.loadCoreMod(CoreModManager.java:485) ~[forge-1.8-11.14.4.1577.jar:?]
 at net.minecraftforge.fml.relauncher.CoreModManager.discoverCoreMods(CoreModManager.java:409) ~[forge-1.8-11.14.4.1577.jar:?]
 at net.minecraftforge.fml.relauncher.CoreModManager.handleLaunch(CoreModManager.java:241) ~[forge-1.8-11.14.4.1577.jar:?]
 at net.minecraftforge.fml.relauncher.FMLLaunchHandler.setupHome(FMLLaunchHandler.java:95) [forge-1.8-11.14.4.1577.jar:?]
 at net.minecraftforge.fml.relauncher.FMLLaunchHandler.setupClient(FMLLaunchHandler.java:72) [forge-1.8-11.14.4.1577.jar:?]
 at net.minecraftforge.fml.relauncher.FMLLaunchHandler.configureForClientLaunch(FMLLaunchHandler.java:34) [forge-1.8-11.14.4.1577.jar:?]
 at net.minecraftforge.fml.common.launcher.FMLTweaker.injectIntoClassLoader(FMLTweaker.java:119) [forge-1.8-11.14.4.1577.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: cpw.mods.fml.relauncher.IFMLLoadingPlugin
 at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.12.jar:?]
 at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_111]
 at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_111]
 ... 23 more
Caused by: java.lang.NullPointerException
 at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182) ~[launchwrapper-1.12.jar:?]
 at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_111]
 at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_111]
 ... 23 more
Exception in thread "main" [18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: java.lang.NoClassDefFoundError: cpw/mods/fml/relauncher/IFMLLoadingPlugin
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.lang.ClassLoader.defineClass1(Native Method)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.lang.ClassLoader.defineClass(Unknown Source)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.security.SecureClassLoader.defineClass(Unknown Source)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.net.URLClassLoader.defineClass(Unknown Source)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.net.URLClassLoader.access$100(Unknown Source)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.net.URLClassLoader$1.run(Unknown Source)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.net.URLClassLoader$1.run(Unknown Source)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.security.AccessController.doPrivileged(Native Method)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.net.URLClassLoader.findClass(Unknown Source)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:117)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.lang.ClassLoader.loadClass(Unknown Source)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.lang.ClassLoader.loadClass(Unknown Source)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.lang.Class.forName0(Native Method)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.lang.Class.forName(Unknown Source)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at net.minecraftforge.fml.relauncher.CoreModManager.loadCoreMod(CoreModManager.java:485)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at net.minecraftforge.fml.relauncher.CoreModManager.discoverCoreMods(CoreModManager.java:409)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at net.minecraftforge.fml.relauncher.CoreModManager.handleLaunch(CoreModManager.java:241)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at net.minecraftforge.fml.relauncher.FMLLaunchHandler.setupHome(FMLLaunchHandler.java:95)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at net.minecraftforge.fml.relauncher.FMLLaunchHandler.setupClient(FMLLaunchHandler.java:72)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at net.minecraftforge.fml.relauncher.FMLLaunchHandler.configureForClientLaunch(FMLLaunchHandler.java:34)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at net.minecraftforge.fml.common.launcher.FMLTweaker.injectIntoClassLoader(FMLTweaker.java:119)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at net.minecraft.launchwrapper.Launch.launch(Launch.java:115)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: Caused by: java.lang.ClassNotFoundException: cpw.mods.fml.relauncher.IFMLLoadingPlugin
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.lang.ClassLoader.loadClass(Unknown Source)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at java.lang.ClassLoader.loadClass(Unknown Source)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  ... 23 more
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]: Caused by: java.lang.NullPointerException
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)
[18:09:30] [main/INFO] [STDERR]: [java.lang.Throwable$WrappedPrintStream:println:-1]:  ... 25 more
루트님이 말한데로 Xmx-1로 바꿧는데 이번에는 런처링 끝나면 런처가 다시뜨면서 위에 것 처럼 뜨네요