Custom modpack server keeps crashing?

[BlazeDraicx]

Hello, I just tried to make a custom modpack server for me and my friends. but it keeps crashing? Which I cannot understand. It doesn't help that MC keeps changing it's ways whenever I gets back to it...

Are there any kind soul who can help?

Update: Dropbox link for the Modpack-http://api.technicpack.net/modpack/magicn-supernatural-combined

 

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

Time: 04/12/15 14:49
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:163)
    at cpw.mods.fml.common.Loader.initializeMods(Loader.java:739)
    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 java.lang.Class.getDeclaredConstructors0(Native Method)
    at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
    at java.lang.Class.getConstructor0(Unknown Source)
    at java.lang.Class.newInstance(Unknown Source)
    at cpw.mods.fml.common.network.simpleimpl.SimpleNetworkWrapper.instantiate(SimpleNetworkWrapper.java:113)
    at cpw.mods.fml.common.network.simpleimpl.SimpleNetworkWrapper.registerMessage(SimpleNetworkWrapper.java:106)
    at thehippomaster.AnimationAPI.AnimationAPI.init(AnimationAPI.java:27)
    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:532)
    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:212)
    at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:190)
    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:119)
    at cpw.mods.fml.common.Loader.initializeMods(Loader.java:737)
    ... 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)
    ... 38 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)
    ... 40 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 8.1 (amd64) version 6.3
    Java Version: 1.8.0_66, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 301891920 bytes (287 MB) / 535298048 bytes (510 MB) up to 1886912512 bytes (1799 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 v7.10.99.99 Minecraft Forge 10.13.4.1558 34 mods loaded, 34 mods active
    States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
    UCHI    mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) 
    UCHI    FML{7.10.99.99} [Forge Mod Loader] (forge-1.7.10-10.13.4.1558-1.7.10-universal.jar) 
    UCHI    Forge{10.13.4.1558} [Minecraft Forge] (forge-1.7.10-10.13.4.1558-1.7.10-universal.jar) 
    UCHI    AM2-Preloader{0.0.2} [AMCore] (minecraft.jar) 
    UCHI    CodeChickenCore{1.0.7.46} [CodeChicken Core] (minecraft.jar) 
    UCHI    NotEnoughItems{1.0.5.110} [Not Enough Items] (NotEnoughItems-1.7.10-1.0.5.110-universal.jar) 
    UCHE    AnimationAPI{1.2.3} [AnimationAPI] (AnimationAPI-1.7.10-1.2.3.jar) 
    UCHE    arsmagica2{1.4.0.008} [Ars Magica 2] (1.7.10_AM2-1.4.0.008.jar) 
    UCHI    Baubles{1.0.1.10} [Baubles] (Baubles-1.7.10-1.0.1.10.jar) 
    UCHI    Thaumcraft{4.2.3.5} [Thaumcraft] (Thaumcraft-1.7.10-4.2.3.5.jar) 
    UCHI    Automagy{0.24.2} [Automagy] (Automagy-1.7.10-0.24.2.jar) 
    UCHI    betterstorage{0.13.1.126} [BetterStorage] (BetterStorage-1.7.10-0.13.1.126.jar) 
    UCHI    BiblioCraft{1.10.4} [BiblioCraft] (BiblioCraft[v1.10.4][MC1.7.10].jar) 
    UCHI    AWWayofTime{v1.3.3} [Blood Magic: Alchemical Wizardry] (BloodMagic-1.7.10-1.3.3-4.jar) 
    UCHI    chocolateQuest{1.0} [Chocolate Quest] (chocolateQuest-1.7.10-1.0.jar) 
    UCHI    DeadlyWorld{1.0.2} [Deadly World] (DeadlyWorld-1.7.10-1.0.2.jar) 
    UCHI    FastCraft{1.21} [FastCraft] (fastcraft-1.21.jar) 
    UCHI    ForbiddenMagic{1.7.10-0.562} [Forbidden Magic] (Forbidden Magic-1.7.10-0.562.jar) 
    UCHI    GraveStone{2.12.3} [GraveStone] (GraveStone-2.12.4.jar) 
    UCHI    HardcoreDarkness{1.5} [Hardcore Darkness] (HardcoreDarkness-1.5.jar) 
    UCHI    inventorytweaks{1.59-dev-152-cf6e263} [Inventory Tweaks] (InventoryTweaks-1.59-dev-152.jar) 
    UCHI    LavaMonsters{2.2.1} [Lava Monsters] (LavaMonsters-1.7.10-2.2.1.jar) 
    UCHI    Mantle{1.7.10-0.3.2.jenkins184} [Mantle] (Mantle-1.7.10-0.3.2.jar) 
    UCHI    Mystcraft{0.11.11.00} [Mystcraft] (mystcraft-1.7.10-0.11.11.00.jar) 
    UCHI    origin{3.4.0} [Origin] (Origin-1.7.10-3.4.0.jar) 
    UCHI    Roguelike{1.3.6.3} [Roguelike Dungeons] (roguelike-1.7.10-1.3.6.3.jar) 
    UCHI    SpecialMobs{3.1.1} [Special Mobs] (SpecialMobs-1.7.10-3.1.1.jar) 
    UCHI    TConstruct{1.7.10-1.8.2.build858} [Tinkers' Construct] (TConstruct-1.7.10-1.8.2a.jar) 
    UCHI    ThaumicExploration{0.6.0} [Thaumic Exploration] (ThaumicExploration-1.7.10-1.1-37.jar) 
    UCHI    TiCTooltips{1.2.4} [TiC Tooltips] (TiCTooltips-mc1.7.10-1.2.4.jar) 
    UCHI    TwilightForest{2.3.7} [The Twilight Forest] (twilightforest-1.7.10-2.3.7.jar) 
    UCHI    AS_UpdateCheck{1.1.6} [AtomicStryker Update Check Mod] (UpdateCheckerMod-1.7.10.jar) 
    UCHI    weepingangels{3.3.2} [Weeping Angels] (WeepingAngels-1.7.10-3.3.2.jar) 
    UCHI    witchery{0.24.1} [Witchery] (witchery-1.7.10-0.24.1.jar) 
    Mantle Environment: Environment healthy.
    TConstruct Environment: Environment healthy.
    Profiler Position: N/A (disabled)
    Is Modded: Definitely; Server brand changed to 'fml,forge'
    Type: Dedicated Server (map_server.txt)

Edited December 4, 2015 by BlazeDraicx

[AetherPirate]

Post a drobox link to your modpack server file. As guess though, I'd say make sure no client-side mods are in your server pack, and all mods that need dependencies have them. 

[BlazeDraicx]

Post a drobox link to your modpack server file. As guess though, I'd say make sure no client-side mods are in your server pack, and all mods that need dependencies have them. 

I have updated the post, with a link to dropbox. I'm sadly not sure which mod is clientside or whatnot, I haven't touched the game since more than 6 months ago :/

[AetherPirate]

The link you provided is for the client modpack, and it launches fine for me. What I need the the server pack you are working on that doesn't launch. Zip it up dropbox it, and post a link. 

[plowmanplow]

This is a good indication that something to do with AnimationAPI is the source of your "client only mods on a server" issue:

Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/multiplayer/WorldClient
    at java.lang.Class.getDeclaredConstructors0(Native Method)
    at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
    at java.lang.Class.getConstructor0(Unknown Source)
    at java.lang.Class.newInstance(Unknown Source)
    at cpw.mods.fml.common.network.simpleimpl.SimpleNetworkWrapper.instantiate(SimpleNetworkWrapper.java:113)
    at cpw.mods.fml.common.network.simpleimpl.SimpleNetworkWrapper.registerMessage(SimpleNetworkWrapper.java:106)
    at thehippomaster.AnimationAPI.AnimationAPI.init(AnimationAPI.java:27)

As for the client pack, it is always a good idea to include mods which are deploaded (loaded automatically as dependencies to other mods). For your pack this would be /1.7.10/Baubles-1.7.10-1.0.1.10.jar and /1.7.10/CodeChickenLib-1.7.10-1.1.3.138-universal.jar.

Client only mods in your pack:

• AnimationAPI-1.7.10-1.2.3
• Reis-Minimap
• TiCTooltips

The catch here is that Ars Magica 2 requires AnimationAPI as a dependency. You need to update to AnimationAPI-1.7.10-1.2.4 in order for it to work properly on a server.

[AetherPirate]

Hey, welcome back Plowmanplow!