Hi new to the forum. before work i downloaded a fresh minecraft 1.2.5 jar and the minecraft forge source from this site.

 

just went to run it throught eclipes as a test without starting to redo any of my mods. and got a crash with the following crash report:

 

1 mod loaded

Minecraft Forge 3.3.7.135

FML v2.2.48.135

Forge Mod Loader version 2.2.48.135 for Minecraft 1.2.5

mod_MinecraftForge : Loaded (src)

 

 

      Minecraft has crashed!     

      ----------------------     

 

Minecraft has stopped running because it encountered a problem.

 

 

 

 

--- BEGIN ERROR REPORT 25f3a2f3 --------

Generated 28/06/12 11:56 PM

 

Minecraft: Minecraft 1.2.5

OS: Windows 7 (amd64) version 6.1

Java: 1.7.0_05, Oracle Corporation

VM: Java HotSpot 64-Bit Server VM (mixed mode), Oracle Corporation

LWJGL: 2.4.2

OpenGL: GeForce GT 325M/PCIe/SSE2 version 3.3.0, NVIDIA Corporation

 

cpw.mods.fml.common.LoaderException: cpw.mods.fml.common.LoaderException: java.lang.NoClassDefFoundError: BaseMod

at cpw.mods.fml.common.Loader.load(Loader.java:436)

at cpw.mods.fml.common.Loader.loadMods(Loader.java:592)

at cpw.mods.fml.client.FMLClientHandler.onPreLoad(FMLClientHandler.java:193)

at net.minecraft.client.Minecraft.startGame(Minecraft.java:383)

at net.minecraft.client.Minecraft.run(Minecraft.java:735)

at java.lang.Thread.run(Unknown Source)

Caused by: cpw.mods.fml.common.LoaderException: java.lang.NoClassDefFoundError: BaseMod

at cpw.mods.fml.common.Loader.loadModClass(Loader.java:527)

at cpw.mods.fml.common.Loader.attemptFileLoad(Loader.java:561)

at cpw.mods.fml.common.Loader.load(Loader.java:419)

... 5 more

Caused by: java.lang.NoClassDefFoundError: BaseMod

at java.lang.ClassLoader.defineClass1(Native Method)

at java.lang.ClassLoader.defineClass(Unknown Source)

at java.security.SecureClassLoader.defineClass(Unknown Source)

at java.net.URLClassLoader.defineClass(Unknown Source)

at java.net.URLClassLoader.access$100(Unknown Source)

at java.net.URLClassLoader$1.run(Unknown Source)

at java.net.URLClassLoader$1.run(Unknown Source)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at java.lang.Class.forName0(Native Method)

at java.lang.Class.forName(Unknown Source)

at cpw.mods.fml.common.Loader.loadModClass(Loader.java:494)

... 7 more

Caused by: java.lang.ClassNotFoundException: BaseMod

at java.net.URLClassLoader$1.run(Unknown Source)

at java.net.URLClassLoader$1.run(Unknown Source)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

... 23 more

--- END ERROR REPORT e45a879b ----------

 

 

 

You didn't set it up properly, or you're trying to run a client mod in mcp as you say.

You need to user the src distro of Forge, with a clean jar and let it set itself up with it's install script.