Minecraft Forums

I'm trying to downgrade to Minecraft 1.2.5 so I can install a mod. I've tried manually downloading the jar from Mojang, using Digiex Minecraft Launcher and using MCNostalgia2.1.2, but they all give me the same error message when I run Minecraft:

	  Minecraft has crashed!	 
	  ----------------------	 
Minecraft has stopped running because it encountered a problem.


--- BEGIN ERROR REPORT 7cf3a456 --------
Generated 16/09/12 7:45 AM
Minecraft: Minecraft 1.2.5
OS: Windows 7 (x86) version 6.1
Java: 1.6.0_29, Sun Microsystems Inc.
VM: Java HotSpot(TM) Client VM (mixed mode), Sun Microsystems Inc.
LWJGL: 2.4.2
OpenGL: Mobile Intel(R) 4 Series Express Chipset Family version 2.1.0 - Build 8.15.10.2202, Intel
java.lang.NullPointerException
at java.io.Reader.<init>(Unknown Source)
at java.io.InputStreamReader.<init>(Unknown Source)
at adn.a(SourceFile:62)
at adn.a(SourceFile:99)
at net.minecraft.client.Minecraft.a(SourceFile:262)
at net.minecraft.client.Minecraft.run(SourceFile:657)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT 5c5c8177 ----------

Does anyone know what the problem is?

Please help.

Download and install Java 7 and completely remove Java 6.

Just download the jar file from minewiki, go into the dat bin folder and switch the jars. simple as that.

Fixed it by deleting my .minecraft folder so all the files were redownloaded and then using MCNostalgia to patch to 1.2.5.