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---- Minecraft Crash Report ----
// Hi. I'm Minecraft, and I'm a crashaholic.

Time: 05/02/15 01:11
Description: Exception in server tick loop

cpw.mods.fml.common.LoaderException: java.lang.NoClassDefFoundError: net/minecraft/client/multiplayer/WorldClient
at cpw.mods.fml.common.LoadController.transition(LoadController.java:162)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:692)
at cpw.mods.fml.server.FMLServerHandler.finishServerLoading(FMLServerHandler.java:97)
at cpw.mods.fml.common.FMLCommonHandler.onServerStarted(FMLCommonHandler.java:319)
at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:210)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:387)
at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)
Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/multiplayer/WorldClient
at DamageIndicatorsMod.server.DIProxy.register(DIProxy.java:14)
at DamageIndicatorsMod.DIMod.load(DIMod.java:65)
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 cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:513)
at sun.reflect.GeneratedMethodAccessor4.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 cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:208)
at cpw.mods.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 cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:118)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:691)
... 5 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.multiplayer.WorldClient
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 bjf for invalid side SERVER
at cpw.mods.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:50)
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:
---------------------------------------------------------------------------------------

-- System Details --
Details:
Minecraft Version: 1.7.10
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 904351480 bytes (862 MB) / 1046478848 bytes (998 MB) up to 2848456704 bytes (2716 MB)
JVM Flags: 0 total;
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v9.05 FML v7.10.85.1230 Minecraft Forge 10.13.2.1230 48 mods loaded, 48 mods active
mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized
FML{7.10.85.1230} [Forge Mod Loader] (forge-1.7.10-10.13.2.1230-universal.jar) Unloaded->Constructed->Pre-initialized->Initialized
Forge{10.13.2.1230} [Minecraft Forge] (forge-1.7.10-10.13.2.1230-universal.jar) Unloaded->Constructed->Pre-initialized->Initialized
CodeChickenCore{1.0.3.23} [CodeChicken Core] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized
NotEnoughItems{1.0.3.60} [Not Enough Items] (Not-Enough-Items-1.7.10 (1).jar) Unloaded->Constructed->Pre-initialized->Initialized
SC0_SpaceCore{0.7.12} [SpaceCore] ([1.7.10] SpaceCore 0.7.12.jar) Unloaded->Constructed->Pre-initialized->Initialized
DamageIndicatorsMod{3.2.0} [Damage Indicators] ([1.7.10]DamageIndicatorsMod-3.2.0.jar) Unloaded->Constructed->Pre-initialized->Errored
animalbikes{1.7.10} [Animal Bikes] (AnimalBikes_1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
asielib{0.2.7} [asielib] (AsieLib-1.7.10.zip) Unloaded->Constructed->Pre-initialized->Initialized
Backpack{2.0.0} [Backpack] (Backpacks-Mod.jar) Unloaded->Constructed->Pre-initialized->Initialized
camping{2.1} [The Camping Mod 2] (Camping-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
CarpentersBlocks{3.2.6} [Carpenter's Blocks] (Carpenter's Blocks v3.2.6 - MC 1.7.10.zip) Unloaded->Constructed->Pre-initialized->Initialized
catwalkmod{1.0} [Catwalks] (Catwalks-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
clockworkphase{1.7.10_1.0a} [Clockwork Phase] (Clockwork-Phase-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
coalcompressor{1.1} [Coal Compressor Mod] (Coal-to-Diamond-Compressor-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
gud_cooler{1.1.5.0} [Coolers] (cooler-1.7.10-1.1.5.0.jar) Unloaded->Constructed->Pre-initialized->Initialized
DragonMounts{r39} [Dragon Mounts] (Dragon-Mounts-Mod-1.7.10 (1).jar) Unloaded->Constructed->Pre-initialized->Initialized
EasyCrafting{1.7.10-2.0.1.16} [Easy Crafting] (Easy-Crafting-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
emotionpotion{1.0} [Emotional Potions Mod] (Emotional-Potions-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
extfar{1.7.10-2.1} [Extended Farming] (extfar-1.7.10-2.1.jar) Unloaded->Constructed->Pre-initialized->Initialized
examplemod{1.0} [examplemod] (Extra-Doors-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
extradoors{1.5.1} [Extra Doors] (Extra-Doors-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
grim3212core{V0.2 - 1.7.10} [Grim3212 Core] (Grim3212-Core-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
fireplaces{V0.1 - 1.7.10} [Fireplaces] (Fireplace-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
fossil{1.7.10 Build 7.0.1} [Fossils and Archeology Revival] (Fossils_Archeology_Revival-1.7.10_Build-7.0.1.jar.zip) Unloaded->Constructed->Pre-initialized->Initialized
freerun{0.1} [Free Runner Mod] (Freerunners-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
harvestcraft{1.7.10d} [Pam's HarvestCraft] (HarvestCraft-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
HopperDuctMod{1.3.2} [Hopper Ducts] (Hopper-Ducts-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
iChunUtil{4.0.0} [iChunUtil] (iChun-Util-Mod-1.7.10(1).jar) Unloaded->Constructed->Pre-initialized->Initialized
inventorytweaks{1.58-147-645ca10} [Inventory Tweaks] (Inventory-Tweaks-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
MedicineCraft{V4.0} [MedicineCraft] (MedicineCraft-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
myfit{1.3} [MyFit] (MyFit-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
mysticores{0.1} [Mystic Ores] (Mystic-Mods-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
mysticruins{0.1} [Mystic Ruins] (Mystic-Mods-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
mysticstones{0.2} [Mystic Stones] (Mystic-Mods-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
mysticworld{0.1a} [Mystic World] (Mystic-Mods-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
powerGems{0.3.0} [Power Gems] (Power-Gems-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
row{1.7.2-014.05.22-1} [Rails of War] (Rails-of-War-Mod-1.7.2.jar) Unloaded->Constructed->Pre-initialized->Initialized
rwbyCraft{1.7.2} [RWBY Craft By KelcoK22] (RWBY-Craft-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
DP_SimpleFlight{0.8} [Simple Flight] (Simple-Flight-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
wuppy29_simplerecipes{1.8.2} [Simple Recipes] (Simple-Recipes-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
simply_sit{1.7.10-1.1.0} [Simply Sit] (Simply-Sit-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
sirenmod{2.1.1} [Mcrafter's Siren Mod (Pre-Release 2.1.01)] (Siren-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
SpongeBobSquarePantsMod{1.0.0} [SpongeBobSquarePantsMod] (SpongeBob-SquarePants-Mod-1.7.10.zip) Unloaded->Constructed->Pre-initialized->Initialized
statues{2.1.4} [Statues] (statues-1.7.10-2.1.4.jar) Unloaded->Constructed->Pre-initialized->Initialized
stonebricks{1.0} [stonebricks] (Stone-Bricks-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
SwordPedestal{1.0(1.7.10)} [Sword Pedestal] (Sword-Pedestal-Mod-1.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
Waila{1.5.3} [Waila] (Waila-Mod-1.7.10(1).jar) Unloaded->Constructed->Pre-initialized->Initialized
Profiler Position: N/A (disabled)
Is Modded: Definitely; Server brand changed to 'fml,forge'
Type: Dedicated Server (map_server.txt)

I did not understand[/pre]

help!!!!!!

like grimallq said it's because your trying to use a client only mod on a server, remove the damage indicators mod since it's the mod causing the current crash and put that mod in your client only not your server