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So, this happened to me last night and I was playing on forge and then it crashed randomly while i was finding a way to figure out all the new mods so here is the crash report. please help me find out what to do.

[21:15:02] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[21:15:02] [main/INFO] [LaunchWrapper]: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[21:15:02] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker
[21:15:02] [main/INFO] [FML]: Forge Mod Loader version 7.2.217.1147 for Minecraft 1.7.2 loading
[21:15:02] [main/INFO] [FML]: Java is Java HotSpot(TM) Client VM, version 1.7.0_71, running on Windows 8.1:x86:6.3, installed at C:\Program Files (x86)\Java\jre7
[21:15:02] [main/INFO] [FML]: [AppEng] Core Init
[21:15:02] [main/WARN] [FML]: The coremod codechicken.nei.asm.NEICorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[21:15:02] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
[21:15:02] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker
[21:15:02] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
[21:15:02] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
[21:15:02] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.relauncher.CoreModManager$FMLPluginWrapper
[21:15:03] [main/INFO] [FML]: Found valid fingerprint for Minecraft Forge. Certificate fingerprint e3c3d50c7c986df74c645c0ac54639741c90a557
[21:15:03] [main/INFO] [FML]: Found valid fingerprint for Minecraft. Certificate fingerprint cd99959656f753dc28d863b46769f7f8fbaefcfc
[21:15:03] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.relauncher.CoreModManager$FMLPluginWrapper
[21:15:03] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.relauncher.CoreModManager$FMLPluginWrapper
[21:15:03] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.relauncher.CoreModManager$FMLPluginWrapper
Exception in thread "main" java.lang.NoClassDefFoundError: codechicken/core/launch/CodeChickenCorePlugin
at codechicken.nei.asm.NEICorePlugin.getASMTransformerClass(NEICorePlugin.java:17)
at cpw.mods.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:99)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:114)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.ClassNotFoundException: codechicken.core.launch.CodeChickenCorePlugin
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:188)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 4 more
Caused by: java.lang.NullPointerException
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:180)
... 6 more

What does ccc stand for

Do I need to install codechickencore?

I installed NEI so that's the problem i'm having? Because last night after i installed NEI it started doing it and can you give me the link to the instructions plz to install NEI and when i deleted NEI permanently i still could not enter MC forge 1.7.2.

Yeah but when i installed CCC before it still not worked Mc just shut the window by itself and then there was no game output.So do i need NEI to install CCC or do i need to install nei first or CCC

[17:43:00] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[17:43:00] [main/INFO] [LaunchWrapper]: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[17:43:00] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker
[17:43:00] [main/INFO] [FML]: Forge Mod Loader version 7.2.217.1147 for Minecraft 1.7.2 loading
[17:43:00] [main/INFO] [FML]: Java is Java HotSpot(TM) Client VM, version 1.8.0_25, running on Windows 7:x86:6.1, installed at C:\Program Files (x86)\Java\jre1.8.0_25
[17:43:00] [main/WARN] [FML]: The coremod mods.battlegear2.coremod.BattlegearLoadingPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[17:43:00] [main/INFO] [FML]: Loading tweaker cpw.mods.fml.common.launcher.FMLTweaker from forge-1.7.2-10.12.0.1046-universal.jar
[17:43:00] [main/WARN] [FML]: The coremod invtweaks.forge.asm.FMLPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[17:43:00] [main/WARN] [FML]: The coremod net.malisis.core.asm.MalisisCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[17:43:00] [main/INFO] [FML]: Loading tweaker shadersmodcore.loading.SMCTweaker from ShadersModCore-v2.3.12-mc1.7.2-f1040.jar
[17:43:00] [main/WARN] [FML]: The coremod portablejim.veinminer.asm.VeinMinerCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[17:43:00] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
[17:43:00] [main/WARN] [LaunchWrapper]: Tweak class name cpw.mods.fml.common.launcher.FMLTweaker has already been visited -- skipping
[17:43:00] [main/INFO] [LaunchWrapper]: Loading tweak class name shadersmodcore.loading.SMCTweaker
[17:43:00] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker
[17:43:00] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
[17:43:00] [main/ERROR] [LaunchWrapper]: Unable to launch
java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(Unknown Source) ~[?:1.8.0_25]
at java.util.ArrayList$Itr.remove(Unknown Source) ~[?:1.8.0_25]
at net.minecraft.launchwrapper.Launch.launch(Launch.java:117) [launchwrapper-1.9.jar:?]
at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.9.jar:?]
Java HotSpot(TM) Client VM warning: Using incremental CMS is deprecated and will likely be removed in a future releasemy 1.7.2 forge is broken I at append direcly when 1.8 is gotten out.

How do i get the right file?

I installed CCC universal and NEI universal and its still not working.

can anyone help please i need serious help

What i mean by "its not working" is that when i load up MC forge 1.7.2 it just shuts down and puts me in game output with no crash report.

This happened to me before on 1.7.10 forge. However, i installed it from another website. But i fixd it by installing the real one.

it says that there is no version caption in the startup log and it can cause problems. So im guessing, does the mod file name have 1.7.2 somewhere in it. i.e. [1.7.2]CodeChickenCore . Make sure u downloaded the right mod version.

yes codechickencore has 1.7.2

Don't worry, I got it fixed because I switched from 1.7.2 to 1.7.10.