Board Thread:General Mod Discussion/@comment-27388204-20161229005644

All of a sudden, the Minecraft launcher isn't working. From the experimentation I've done, it's certainly something to do with Forge.

This is the text that was on the latest log file. Can any of you point me in the right direction? Thanks.

[12:09:25] [main/INFO]: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker

[12:09:25] [main/ERROR]: Unable to launch

java.lang.ClassNotFoundException: cpw.mods.fml.common.launcher.FMLTweaker

at java.net.URLClassLoader$1.run(URLClassLoader.java:366) ~[?:1.7.0_25]

at java.net.URLClassLoader$1.run(URLClassLoader.java:355) ~[?:1.7.0_25]

at java.security.AccessController.doPrivileged(Native Method) ~[?:1.7.0_25]

at java.net.URLClassLoader.findClass(URLClassLoader.java:354) ~[?:1.7.0_25]

at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.7.0_25]

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) ~[?:1.7.0_25]

at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.7.0_25]

at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:106) ~[launchwrapper-1.11.jar:?]

at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.7.0_25]

at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.7.0_25]

at java.lang.Class.forName0(Native Method) ~[?:1.7.0_25]

at java.lang.Class.forName(Class.java:270) ~[?:1.7.0_25]

at net.minecraft.launchwrapper.Launch.launch(Launch.java:98) [launchwrapper-1.11.jar:?]

<p style="font-weight:normal;font-size:14px;margin-bottom:0px!important;">at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.11.jar:?] <ac_metadata title="Can&#039;t open MC - please help!!!"> </ac_metadata>