Minecraft Forums

I am using the curse launcher

[21:20:27] [main/INFO]: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[21:20:27] [main/ERROR]: Unable to launch
java.lang.ClassNotFoundException: cpw.mods.fml.common.launcher.FMLTweaker
at java.net.URLClassLoader$1.run(Unknown Source) ~[?:1.7.0_80]
at java.net.URLClassLoader$1.run(Unknown Source) ~[?:1.7.0_80]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.7.0_80]
at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.7.0_80]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:106) ~[launchwrapper-1.12.jar:?]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at java.lang.Class.forName0(Native Method) ~[?:1.7.0_80]
at java.lang.Class.forName(Unknown Source) ~[?:1.7.0_80]
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:?]

is that the whole report?...if it is then it says a class isn't found. What i would try is reinstalling the pack so it reinstalls forge and try again. If that doesnt work you could try and install the version of forge manually with the installer or universal manual manual way. which MIGHT just work

It says this directory does not have a launcher profile

i have the latest driver

I installed the hotfix , still not working

Which Java Version Should I Use?

not working with v121

plz help

[18:51:07] [main/INFO]: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[18:51:07] [main/ERROR]: Unable to launch
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:?]

Have you tried to redownload forge?

Quote from Robijnvogel»

Your Minecraft is not using Java 8v121, but 8v25

Have you tried Katnip_Destroyer's suggestion yet?

Quote from Robijnvogel»

In that case you should first run Vanilla Minecraft at least once in your Curse Launcher.

plz help

which forge version should i use?

1614 gives me the error that i started with

Quote from Robijnvogel»

How are you trying to install Forge?
1. Using the Curse Launcher?
OR
2. Using a manually downloaded Forge installer?

thanks for your help it just started working