java.lang.ClassNotFoundException

cpw.mods.fml.common.launcher.FMLTweaker

Samebug tips9

You need to add httpcore to your dependencies. Try adding version 4.3 or further.

A few things cause this exception: 1) Check if you have all jars and if they're in the correct path when running. 2) Your classpath might be broken, you can define it in the command line with "java -cp yourClassPath" or at your IDE if you're using one.

Don't give up yet. Our experts can help. Paste your full stack trace to get a solution.

Solutions on the web117

  • cpw.mods.fml.common.launcher.FMLTweaker
  • cpw.mods.fml.common.launcher.FMLTweaker
  • cpw.mods.fml.common.launcher.FMLTweaker
  • Stack trace

    • java.lang.ClassNotFoundException: cpw.mods.fml.common.launcher.FMLTweaker at java.net.URLClassLoader$1.run(URLClassLoader.java:372)[?:1.8.0_25] at java.net.URLClassLoader$1.run(URLClassLoader.java:361)[?:1.8.0_25] at java.security.AccessController.doPrivileged(Native Method)[?:1.8.0_25] at java.net.URLClassLoader.findClass(URLClassLoader.java:360)[?:1.8.0_25] at java.lang.ClassLoader.loadClass(ClassLoader.java:424)[?:1.8.0_25] at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)[?:1.8.0_25] at java.lang.ClassLoader.loadClass(ClassLoader.java:357)[?:1.8.0_25] at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:106)[launchwrapper-1.12.jar:?] at java.lang.ClassLoader.loadClass(ClassLoader.java:424)[?:1.8.0_25] at java.lang.ClassLoader.loadClass(ClassLoader.java:357)[?:1.8.0_25] at java.lang.Class.forName0(Native Method)[?:1.8.0_25] at java.lang.Class.forName(Class.java:344)[?:1.8.0_25] at net.minecraft.launchwrapper.Launch.launch(Launch.java:98)[launchwrapper-1.12.jar:?] at net.minecraft.launchwrapper.Launch.main(Launch.java:28)[launchwrapper-1.12.jar:?]

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