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Posted

Ive tried using MC versions 1.8-current, I cannot get forge to load with minecraft so that i can even attempt to use a modpack, ive uninstalled everything and reinstalled forge minecraft java tried java 7 and 8, tried different "loaders" like the curse loader multimcloader nothing seems to work. I get this error. 

WARN Unable to instantiate org.fusesource.jansi.WindowsAnsiOutputStream

[main/INFO]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker

[main/ERROR]: Unable to launch

java.lang.ClassNotFoundException: net.minecraftforge.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:?]

Java HotSpot 64-Bit Server VM warning: ignoring option PermSize=256m; support was removed in 8.0

 

 

Posted

This is caused by either having a corrupt install or using a broken launcher.

Delete the libraries folder, reinstall Forge and use the vanilla launcher.

I do Forge for free, however the servers to run it arn't free, so anything is appreciated.
Consider supporting the team on Patreon

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