This is what popped up when Tekkit crashed.
Minecraft has crashed!
----------------------
Minecraft has stopped running because it encountered a problem.
--- BEGIN ERROR REPORT 7dfb87b2 --------
Generated 3/20/13 5:06 PM
Minecraft: Minecraft 1.2.5
OS: Windows 7 (x86) version 6.1
Java: 1.7.0_17, Oracle Corporation
VM: Java HotSpot Client VM (mixed mode), Oracle Corporation
LWJGL: 2.4.2
OpenGL: IntelĀ® HD Graphics Family version 3.0.0 - Build 8.15.10.2353, Intel
java.lang.NullPointerException
at cpw.mods.fml.common.modloader.ModLoaderModContainer.init(ModLoaderModContainer.java:356)
at cpw.mods.fml.common.Loader.modInit(Loader.java:273)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:628)
at cpw.mods.fml.client.FMLClientHandler.onLoadComplete(FMLClientHandler.java:223)
at net.minecraft.client.Minecraft.a(Minecraft.java:429)
at net.minecraft.client.Minecraft.run(Minecraft.java:738)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT 8ddfa13b ----------