Crash

---- Minecraft Crash Report ----
// You should try our sister game, Minceraft!

Time: 2/10/15 7:44 PM
Description: Exception in server tick loop

net.minecraftforge.fml.common.LoaderException: java.lang.NoClassDefFoundError: net/minecraft/client/Minecraft
	at net.minecraftforge.fml.common.LoadController.transition(LoadController.java:162)
	at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:516)
	at net.minecraftforge.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:88)
	at net.minecraftforge.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:322)
	at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:117)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:438)
	at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/Minecraft
	at com.expanded.rails.mod.ERMBase.Init(ERMBase.java:677)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at net.minecraftforge.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:515)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
	at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
	at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
	at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
	at com.google.common.eventbus.EventBus.post(EventBus.java:275)
	at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:208)
	at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:187)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
	at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
	at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
	at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
	at com.google.common.eventbus.EventBus.post(EventBus.java:275)
	at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:118)
	at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:514)
	... 5 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.Minecraft
	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	... 33 more
Caused by: java.lang.RuntimeException: Attempted to load class bsu for invalid side SERVER
	at net.minecraftforge.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:49)
	at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279)
	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176)
	... 35 more


A detailed walkthrough of the error, its code path and all known details is as follows:
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-- System Details --
Details:
	Minecraft Version: 1.8
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.8.0_31, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 628738376 bytes (599 MB) / 734003200 bytes (700 MB) up to 1868038144 bytes (1781 MB)
	JVM Flags: 0 total;
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	FML: MCP v9.10 FML v8.0.26.1305 Minecraft Forge 11.14.1.1305 4 mods loaded, 4 mods active
	mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized
	FML{8.0.26.1305} [Forge Mod Loader] (forge-1.8-11.14.1.1305-universal.jar) Unloaded->Constructed->Pre-initialized
	Forge{11.14.1.1305} [Minecraft Forge] (forge-1.8-11.14.1.1305-universal.jar) Unloaded->Constructed->Pre-initialized
	ExpandedRailsMod{1.6.1} [Expanded Rails Mod] (ExpandedRailsMod-1.6.1.jar) Unloaded->Constructed->Errored
	Profiler Position: N/A (disabled)
	Is Modded: Definitely; Server brand changed to 'fml,forge'
	Type: Dedicated Server (map_server.txt)