Hey. I am quite new to this forum, as well as modding. I know a bit of Java, but have never modded before. I use a Mac. I have encountered a problem, and haven't been able to find the solution, so here we go. I followed the setup guide for Forge Gradle. I didn't notice any errors in Terminal. So I pointed the Eclipse directory to the 'eclipse' folder, as instructed by the guide. In Eclipse, everything seemed fine. No errors really, so I attempted to run Minecraft as an application. I got this error.

 

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[14:47:57] [main/INFO]: Setting user: Rane1011

Exception in thread "main" java.lang.ClassCastException: sun.misc.Launcher$AppClassLoader cannot be cast to net.minecraft.launchwrapper.LaunchClassLoader

at cpw.mods.fml.common.ModClassLoader.<init>(ModClassLoader.java:46)

at cpw.mods.fml.common.Loader.<init>(Loader.java:181)

at cpw.mods.fml.common.Loader.instance(Loader.java:160)

at cpw.mods.fml.common.registry.GameData.addPrefix(GameData.java:901)

at cpw.mods.fml.common.registry.GameData.register(GameData.java:736)

at cpw.mods.fml.common.registry.FMLControlledNamespacedRegistry.addObject(FMLControlledNamespacedRegistry.java:117)

at net.minecraft.block.Block.registerBlocks(Block.java:243)

at net.minecraft.init.Bootstrap.func_151354_b(Bootstrap.java:457)

at net.minecraft.client.Minecraft.<init>(Minecraft.java:333)

at net.minecraft.client.main.Main.main(Main.java:141)

 

 

I used these Arguments:

--version 1.6 --tweakClass cpw.mods.fml.common.launcher.FMLTweaker --accessToken FML --username Rane1011 --userProperties {} --password password

 

I don't know what to do. Please lead me in the right direction.

Thanks,

  ~Rane

1) did you do the "./gradlew eclipse" command yet?

2) did you run the minecraft application itself, or did you run the program from eclipse ( which is what works for me)?

Good luck!

Yes I did. Still got the same error. D:

It worked. Thank you for your help!