This is using the ftb-unleashed modpack with certain things taken out and added in. All of the mods load  but I get a "java.lang.NoClassDefFoundError" with a description of "Exception in server tick loop"

 

Here is the full error message

---- Minecraft Crash Report ----
// Would you like a cupcake?

Time: 02/10/13 22:10
Description: Exception in server tick loop

java.lang.NoClassDefFoundError: net/minecraft/client/multiplayer/WorldClient
at net.minecraft.server.management.PlayerManager.<init>(PlayerManager.java:49)
at net.minecraft.world.WorldServer.<init>(WorldServer.java:110)
at net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.java:238)
at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:186)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:431)
at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.multiplayer.WorldClient
at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:238)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 6 more
Caused by: java.lang.RuntimeException: Attempted to load class bds for invalid side SERVER
at cpw.mods.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:50)
at cpw.mods.fml.relauncher.RelaunchClassLoader.runTransformers(RelaunchClassLoader.java:352)
at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:225)
... 8 more


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 (x86) version 6.1
Java Version: 1.7.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 405794704 bytes (386 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)
JVM Flags: 3 total; -Xms512M -Xmx1G -XX:PermSize=256m
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: MCP v7.51 FML v5.2.23.738 Minecraft Forge 7.8.1.738 65 mods loaded, 65 mods active
mcp{7.51} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
FML{5.2.23.738} [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
Forge{7.8.1.738} [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
CodeChickenCore{0.8.7.2} [CodeChicken Core] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
CoFHFramework{1.5.2.5} [CoFH Framework] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
NotEnoughItems{1.5.2.28} [Not Enough Items] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
PowerCrystalsCore{1.1.6} [PowerCrystals Core] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
TooMuchTNT{2.4} [TooMuchTNT] (minecraft_server.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
CoFHCore{1.5.2.5} [CoFHCore] (CoFHCore-1.5.2.5.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
CoFHWorld{1.5.2.5} [CoFHWorld] (CoFHCore-1.5.2.5.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
DamageIndicatorsMod{2.7.0.1} [Damage Indicators] (1.5.2 DamageIndicators v2.7.0.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
ArchimedesShipsMod{1.5.2 v1.3.5} [Archimedes' Ships] (ArchimedesShips v1.3.5 for 1.5.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
BiblioCraft{1.3.3} [biblioCraft] (BiblioCraft[v1.3.3].zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
BuildCraft|Core{3.7.1} [buildCraft] (buildcraft-A-3.7.1.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
BuildCraft|Builders{3.7.1} [bC Builders] (buildcraft-A-3.7.1.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
BuildCraft|Energy{3.7.1} [bC Energy] (buildcraft-A-3.7.1.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
BuildCraft|Factory{3.7.1} [bC Factory] (buildcraft-A-3.7.1.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
BuildCraft|Transport{3.7.1} [bC Transport] (buildcraft-A-3.7.1.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
BuildCraft|Silicon{3.7.1} [bC Silicon] (buildcraft-A-3.7.1.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
CastleDef{1.0.0} [Castle Defenders] (CastleDefenders1.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
ChickenChunks{1.3.2.12} [ChickenChunks] (ChickenChunks 1.3.2.12.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
EnderStorage{1.4.2.14} [EnderStorage] (EnderStorage 1.4.2.14.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
EE3{pre1h (build 16)} [Equivalent Exchange 3] (Equivalent-Exchange-3-Mod-1.5.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
factorization{0.8.01} [Factorization] (Factorization-0.8.01.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
factorization.misc{0.8.01} [Factorization Miscellaneous Nonsense] (Factorization-0.8.01.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
factorization.dimensionalSlice{0.8.01} [Factorization Dimensional Slices] (Factorization-0.8.01.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
FlansMod{2.4} [Flan's Mod] (Flans Mod 2.3.2 for Minecraft 1.5.2 Universal.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
MineFactoryReloaded|CompatForestryPre{1.5.1R2.6.4} [MFR Compat: Forestry (2)] (MineFactoryReloaded-2.6.4-975.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
Forestry{2.2.6.2} [Forestry for Minecraft] (forestry 1.5.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
ForgeIRC{1.0.18} [ForgeIRC] (ForgeIRC-1.0.18-universal-srg.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
GP{1.4.1} [Gems+] (GemsPlus_Forge_1.5.2v4.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
iChunUtil{1.0.1} [iChunUtil] (iChunUtil1.5.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
inventorytweaks{1.54b} [inventory Tweaks] (inventorytweaks-1.54b.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
IronChest{5.2.8.433} [iron Chest] (ironchest-universal-1.5.2-5.2.8.433.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
MFFS{3.1.0} [Modular Force Field System] (MFFS_v3.1.0.175.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
MineFactoryReloaded{1.5.1R2.6.4} [MineFactory Reloaded] (MineFactoryReloaded-2.6.4-975.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
MineFactoryReloaded|CompatAppliedEnergistics{1.5.1R2.6.4} [MFR Compat: Applied Energistics] (MineFactoryReloaded-2.6.4-975.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
MineFactoryReloaded|CompatAtum{1.5.1R2.6.4} [MFR Compat: Atum] (MineFactoryReloaded-2.6.4-975.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
MineFactoryReloaded|CompatBackTools{1.5.1R2.6.4} [MFR Compat: BackTools] (MineFactoryReloaded-2.6.4-975.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
MineFactoryReloaded|CompatBiomesOPlenty{1.5.1R2.6.4} [MFR Compat: Biomes O' Plenty] (MineFactoryReloaded-2.6.4-975.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
MineFactoryReloaded|CompatChococraft{1.5.1R2.6.4} [MFR Compat: Chococraft] (MineFactoryReloaded-2.6.4-975.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
MineFactoryReloaded|CompatExtraBiomes{1.5.1R2.6.4} [MFR Compat: ExtraBiomes] (MineFactoryReloaded-2.6.4-975.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
MineFactoryReloaded|CompatForestry{1.5.1R2.6.4} [MFR Compat: Forestry] (MineFactoryReloaded-2.6.4-975.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
MineFactoryReloaded|CompatIC2{1.5.1R2.6.4} [MFR Compat: IC2] (MineFactoryReloaded-2.6.4-975.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
MineFactoryReloaded|CompatMagicalCrops{1.5.1R2.6.4} [MFR Compat: Magical Crops] (MineFactoryReloaded-2.6.4-975.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
Mystcraft{0.10.5.00} [Mystcraft] (mystcraft-uni-1.5.2-0.10.5.00.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
MineFactoryReloaded|CompatMystcraft{1.5.1R2.6.4} [MFR Compat: Mystcraft] (MineFactoryReloaded-2.6.4-975.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
MineFactoryReloaded|CompatPams{1.5.1R2.6.4} [MFR Compat: Pam's Mods] (MineFactoryReloaded-2.6.4-975.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
MineFactoryReloaded|CompatRP2{1.5.1R2.6.4} [MFR Compat: RP2] (MineFactoryReloaded-2.6.4-975.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
MineFactoryReloaded|CompatSoulShards{1.5.1R2.6.4} [MFR Compat: SoulShards] (MineFactoryReloaded-2.6.4-975.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
MineFactoryReloaded|CompatSufficientBiomes{1.5.1R2.6.4} [MFR Compat: Sufficient Biomes] (MineFactoryReloaded-2.6.4-975.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
Thaumcraft{3.0.5f} [Thaumcraft] (Thaumcraft3.0.5f.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
MFReloaded|CompatThaumcraft{1.5.1R2.6.4} [MFR Compat: Thaumcraft] (MineFactoryReloaded-2.6.4-975.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
ThermalExpansion{2.4.6.0} [Thermal Expansion] (ThermalExpansion-2.4.6.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
MineFactoryReloaded|CompatThermalExpansion{1.5.1R2.6.4} [MFR Compat: Thermal Expansion] (MineFactoryReloaded-2.6.4-975.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
MineFactoryReloaded|CompatTwilightForest{1.5.1R2.6.4} [MFR Compat: TwilightForest] (MineFactoryReloaded-2.6.4-975.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
MineFactoryReloaded|CompatVanilla{1.5.1R2.6.4} [MFR Compat: Vanilla] (MineFactoryReloaded-2.6.4-975.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
MineFactoryReloaded|CompatXyCraft{1.5.1R2.6.4} [MFR Compat: XyCraft] (MineFactoryReloaded-2.6.4-975.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
mmmPowersuits{0.6.0-444} [MachineMuse's Modular Powersuits] (ModularPowersuits 1.5.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
mod_morestorage{v2.0.1} [MoreStorage] (MoreStorage-v2-0-1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
NEIPlugins{1.0.9.3} [NEI Plugins] (NEIPlugins-1.0.9.3.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
PortalGun{1.5.2} [PortalGun] (PortalGun1.5.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
Railcraft{7.3.0.0} [Railcraft] (Railcraft_1.5.2-7.3.0.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
TrailMix{1.5.0.1} [TrailMix] (TrailMix1.5.0v1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
UsefulFood{1.4.3} [usefulFood] (UsefulFood-1.5.1_1.4.3-universal.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
Profiler Position: N/A (disabled)
Player Count: 0 / 20; []
Is Modded: Definitely; Server brand changed to 'fml,forge'
Type: Dedicated Server (map_server.txt)

 

Any help would be appreciated

 

Thanks in advance

One of the mods you have installed does not support dedicated servers. You'll have to figure out which one.