Minecraft Forums

I am using 1.5.2 with the new launcher and the mods Forge, GuiAPI, Bibliocraft, Mo' Creatures, CustomMobSpawner, ExtraBiomesXL, Chisel, Slabcraft, Staircraft, ExtraDoors, and Simply Horses. I wanted HD textures for Simply Horses, so I tried to install OptiFine. I downloaded OptiFine HD D5 for 1.5.2, dragged the contents of the zip to the minecraft jar, ran minecraft and it crashed with the following crash report:

---- Minecraft Crash Report ----
// Daisy, daisy...
Time: 1/19/14 10:03 PM
Description: Failed to start game
java.lang.NullPointerException
at net.minecraft.client.gui.FontRenderer.getFontTexturePack(FontRenderer.java:1144)
at net.minecraft.client.gui.FontRenderer.func_98306_d(FontRenderer.java:222)
at net.minecraft.client.gui.FontRenderer.func_98304_a(FontRenderer.java:150)
at net.minecraft.client.gui.FontRenderer.<init>(FontRenderer.java:112)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:408)
at net.minecraft.client.MinecraftAppletImpl.func_71384_a(SourceFile:56)
at net.minecraft.client.Minecraft.run(Minecraft.java:733)
at java.lang.Thread.run(Unknown Source)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- System Details --
Details:
Minecraft Version: 1.5.2
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_21, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 120498240 bytes (114 MB) / 279707648 bytes (266 MB) up to 954466304 bytes (910 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML:
LWJGL: 2.9.0
OpenGL: ATI Radeon HD 5450 GL version 4.0.9896 Compatibility Profile Context, ATI Technologies Inc.
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Texture Pack: Default
Profiler Position: N/A (disabled)
Vec3 Pool Size: ~~ERROR~~ NullPointerException: null

What did I do wrong?

Well optifine is very buggy with forge(thus 1.6+ they are no longer compatible) and also with several of the mods you are running you might have to re-download the .jar load forge again then put the mods back in. Unfortunately your horses wont get any HD textures.

Oh, well. Thanks for answering, anyways C:

EDIT:
Nevermind! Got them all working with MagicLauncher and some file extension changes...

Thats good to know that it works with 1.5 still.