I have a custom GUI with a crafting grid in my mod, and I wanted to integrate NEI shift-clicking.

 

I downloaded the recommended "dev" jars of CCC and NEI from here:

 

http://chickenbones.net/Pages/links.html

 

I added them to the "lib" folder of my project, and I also added them to the "mods" folder of my instance. Now when I try to run the project, I get errors just like this (not my log, but exact same problem):

 

https://gist.github.com/OrionDevelopment/76baa2bc12ae70a85559

 

Am I doing this incorrectly?

Use gradle to fetch everything for you.

 

Add this to your build.gradle (you need to change the versions as they come from a property file for me):

dependencies {
    compile "codechicken:CodeChickenLib:${config.minecraft_version}-${config.codechickenlib_version}:dev"
    compile "codechicken:CodeChickenCore:${config.minecraft_version}-${config.codechickencore_version}:dev"
    compile "codechicken:ForgeMultipart:${config.minecraft_version}-${config.forgemultipart_version}:dev"
    compile "codechicken:NotEnoughItems:${config.minecraft_version}-${config.notenoughitems_version}:dev"
}