Modding Problem - Help please!

[Jaye]

I've been trying to set up a dev environment using Eclipse but when I try to run I get this error


Exception in thread "main" java.lang.NoClassDefFoundError: cpw/mods/fml/relauncher/ServerLaunchWrapper
Caused by: java.lang.ClassNotFoundException: cpw.mods.fml.relauncher.ServerLaunchWrapper
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)

I also run on Mac if that makes any difference! Hope someone can help!

 

[jimboba12]

either one of the other mods r not compatible or u need chicken chunks and code chicken core in the coremods

 

[Jaye]

I'm trying set up a development environment not a playing environment! This is an error I'm getting from Eclipse