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I just installed buildcraft and forge. After a couple of minutes of playing minecraft, it crashes and gives this error message. I was just in my test world building a quarry and this happens.




---- Minecraft Crash Report ----
// Don't do that.

Time: 29/04/13 5:21 PM
Description: Exception in server tick loop

java.lang.NoSuchMethodError: net.minecraftforge.liquids.LiquidTank.writeToNBT(Lnet/minecraft/nbt/NBTTagCompound;)Lnet/minecraft/nbt/NBTTagCompound;
at buildcraft.energy.EngineIron.writeToNBT(EngineIron.java:235)
at buildcraft.energy.TileEngine.func_70310_b(TileEngine.java:252)
at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75820_a(AnvilChunkLoader.java:310)
at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75816_a(AnvilChunkLoader.java:127)
at net.minecraft.world.gen.ChunkProviderServer.func_73242_b(ChunkProviderServer.java:232)
at net.minecraft.world.gen.ChunkProviderServer.func_73151_a(ChunkProviderServer.java:284)
at net.minecraft.world.WorldServer.func_73044_a(WorldServer.java:903)
at net.minecraft.server.MinecraftServer.func_71267_a(MinecraftServer.java:344)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:576)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:171)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:468)
at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
Minecraft Version: 1.5.1
Operating System: Windows XP (x86) version 5.1
Java Version: 1.7.0_21, Oracle Corporation
Java VM Version: Java HotSpot™ Client VM (mixed mode, sharing), Oracle Corporation
Memory: 361765848 bytes (345 MB) / 518979584 bytes (494 MB) up to 518979584 bytes (494 MB)
JVM Flags: 3 total; -Xms512m -Xmx1024m -Xmx512M
AABB Pool Size: 2717 (152152 bytes; 0 MB) allocated, 2449 (137144 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 2, tallocated: 62
FML: MCP v7.44 FML v5.1.8.611 Minecraft Forge 7.7.1.611 Optifine OptiFine_1.5.1_HD_U_D1 9 mods loaded, 9 mods active
mcp [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FML [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Forge [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
BuildCraft|Core [BuildCraft] (buildcraft-A-3.5.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
BuildCraft|Builders [BC Builders] (buildcraft-A-3.5.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
BuildCraft|Energy [BC Energy] (buildcraft-A-3.5.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
BuildCraft|Factory [BC Factory] (buildcraft-A-3.5.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
BuildCraft|Transport [BC Transport] (buildcraft-A-3.5.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
BuildCraft|Silicon [BC Silicon] (buildcraft-A-3.5.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Profiler Position: N/A (disabled)
Vec3 Pool Size: 646 (36176 bytes; 0 MB) allocated, 612 (34272 bytes; 0 MB) used
Player Count: 1 / 8; [EntityPlayerMP['chohan_17'/234, l='New World', x=160.70, y=61.00, z=297.70]]
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'forge,fml'


I don't know what to do! Please help me! Also Im a noob to minecraft!

I guess you're using technicpack you're probably having a lack of ram in the application, do this, click the gear icon, its on the bottom of the Tekkit image, then add more ram to it, it needs 2-3 to work properly.

I just have buildcraft installed with forge thats all.