Placing the rolling machine automatically crashes the client and/or server. This is a 1.7.2 server.

@!@# Game crashed! Crash report saved to: #@!@# G:\Minecraft\MultiMC\instances\Bearly Vanilla V0.80\minecraft\crash-reports\crash-2014-05-02_18.05.23-server.txt

[18:05:23] [Client Shutdown Thread/INFO]: Stopping server
[18:05:23] [Client Shutdown Thread/INFO]: Saving players
Exception in thread "Client Shutdown Thread" java.lang.NoSuchMethodError: net.minecraft.nbt.NBTTagCompound.setDouble(Ljava/lang/String;D)V
at buildcraft.api.power.PowerHandler.writeToNBT(PowerHandler.java:336)
at buildcraft.api.power.PowerHandler.writeToNBT(PowerHandler.java:331)
at mods.railcraft.common.blocks.machine.alpha.TileRollingMachine.func_145841_b(TileRollingMachine.java:104)
at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75820_a(AnvilChunkLoader.java:298)
at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75816_a(AnvilChunkLoader.java:125)
at net.minecraft.world.gen.ChunkProviderServer.func_73242_b(ChunkProviderServer.java:196)
at net.minecraft.world.gen.ChunkProviderServer.func_73151_a(ChunkProviderServer.java:241)
at net.minecraft.world.WorldServer.func_73044_a(WorldServer.java:819)
at net.minecraft.server.MinecraftServer.func_71267_a(MinecraftServer.java:308)
at net.minecraft.server.MinecraftServer.func_71260_j(MinecraftServer.java:338)
at net.minecraft.server.integrated.IntegratedServer.func_71260_j(IntegratedServer.java:230)
at net.minecraft.client.Minecraft.func_71363_D(Minecraft.java:2508)
at net.minecraft.client.main.Main$2.run(SourceFile:95)
AL lib: (EE) alc_cleanup: 1 device not closed
Minecraft exited with exitcode -1.

Resolved by modifying buildscript with AbrarSyed's help.

Roger that. Will add it to the pack, thank you for your assistance I truly appreciate your efforts :)

Try updating to Java 8 or increasing your permgen.

Using Java 8 (64bit obv) and Perm Gen is set at 256...

Hmm...oh...the BC API is not obfuscated. Are you using RC 8.4.0.13?

That I'm not sure because the .jar just says 1.7.2

Where did you get that jar? None of my jar's are named like that...

Go download it from http://minecraft.curseforge.com/mc-mods/railcraft/files/13-railcraft-8-4-0-13/

mod-minecraft.net

I suggest you never download from there again. They are not a reputable distributor.

at buildcraft.api.power.PowerHandler.writeToNBT(PowerHandler.java:336)
at buildcraft.api.power.PowerHandler.writeToNBT(PowerHandler.java:331)
at mods.railcraft.common.blocks.machine.alpha.TileRollingMachine.func_145841_b(TileRollingMachine.java:104)
at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75820_a(AnvilChunkLoader.java:298)
at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75816_a(AnvilChunkLoader.java:125)
at net.minecraft.world.gen.ChunkProviderServer.func_73242_b(ChunkProviderServer.java:196)
at net.minecraft.world.gen.ChunkProviderServer.func_73151_a(ChunkProviderServer.java:241)
at net.minecraft.world.WorldServer.func_73044_a(WorldServer.java:819)
at net.minecraft.server.MinecraftServer.func_71267_a(MinecraftServer.java:308)
at net.minecraft.server.MinecraftServer.func_71260_j(MinecraftServer.java:338)
at net.minecraft.server.integrated.IntegratedServer.func_71260_j(IntegratedServer.java:230)
at net.minecraft.client.Minecraft.func_71363_D(Minecraft.java:2508)
at net.minecraft.client.main.Main$2.run(SourceFile:95)

Pretty sure I am getting the same error.

Ok, confirmed issue. Installing Buildcraft should fix it temporarily.