Minecraft Forums

java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at magic.launcher.Launcher.main(Unknown Source)
Caused by: java.lang.IncompatibleClassChangeError: Implementing class
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$000(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at jh.<clinit>(jh.java:80)
at pb.<clinit>(Block.java:1455)
at qa.<init>(SourceFile:14)
at net.minecraft.client.Minecraft.<init>(Minecraft.java:232)
at hq.<init>(SourceFile:2073)
at net.minecraft.client.Minecraft.a(Minecraft.java:2380)
at net.minecraft.client.Minecraft.a(Minecraft.java:2367)
at net.minecraft.client.Minecraft.main(Minecraft.java:2431)
... 5 more