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So I tried to create a server with about 60 different mods and then got this error java.lang.NoClassDefFoundError: net/minecraft/client/entity/EntityPlayerSP I really don't know what's causing this problem since I removed all client-side mods from the mods folder. Here's the server's crash report. ---- Minecraft Crash Report ---- WARNING: coremods are present: SecretRoomsMod-Core (Secret-Rooms-Mod-1.12.2.jar) midnight (themidnight-0.3.5.jar) MicdoodlePlugin (MicdoodleCore-1.12.2-4.0.2.238.jar) MalisisCorePlugin (MalisisCore-1.12.2.jar) Contact their authors BEFORE contacting forge // Daisy, daisy... Time: 25.10.2019 18:44 Description: Exception in server tick loop java.lang.NoClassDefFoundError: net/minecraft/client/entity/EntityPlayerSP at mod.mcreator.mcreator_communistBlock.<clinit>(mcreator_communistBlock.java:78) at mod.mcreator.communist.<init>(communist.java:44) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at java.lang.Class.newInstance(Unknown Source) at net.minecraftforge.fml.common.ILanguageAdapter$JavaAdapter.getNewInstance(ILanguageAdapter.java:191) at net.minecraftforge.fml.common.FMLModContainer.constructMod(FMLModContainer.java:599) at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91) at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150) at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76) at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399) at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71) at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116) at com.google.common.eventbus.EventBus.post(EventBus.java:217) at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:219) at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:197) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91) at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150) at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76) at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399) at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71) at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116) at com.google.common.eventbus.EventBus.post(EventBus.java:217) at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:136) at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:593) at net.minecraftforge.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:98) at net.minecraftforge.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:333) at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:125) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:486) at java.lang.Thread.run(Unknown Source) Caused by: java.lang.ClassNotFoundException: net.minecraft.client.entity.EntityPlayerSP at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) ... 39 more Caused by: net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerException: Exception in class transformer [email protected]85c13de from coremod FMLCorePlugin at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:260) at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ... 41 more Caused by: java.lang.RuntimeException: Attempted to load class bud for invalid side SERVER at net.minecraftforge.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:62) at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:256) ... 43 more A detailed walkthrough of the error, its code path and all known details is as follows: --------------------------------------------------------------------------------------- -- System Details -- Details: Minecraft Version: 1.12.2 Operating System: Windows 10 (amd64) version 10.0 Java Version: 1.8.0_221, Oracle Corporation Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation Memory: 651275368 bytes (621 MB) / 844627968 bytes (805 MB) up to 1895825408 bytes (1808 MB) JVM Flags: 0 total; IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0 FML: MCP 9.42 Powered by Forge 14.23.5.2838 60 mods loaded, 60 mods active States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored | State | ID | Version | Source | Signature | |:----- |:------------------- |:--------------------- |:------------------------------------------------- |:---------------------------------------- | | LC | minecraft | 1.12.2 | minecraft.jar | None | | LC | mcp | 9.42 | minecraft.jar | None | | LC | FML | 8.0.99.99 | forge.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 | | LC | forge | 14.23.5.2838 | forge.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 | | LC | micdoodlecore | | minecraft.jar | None | | LC | srm-hooks | 1.12.2-1.0.0 | minecraft.jar | None | | LC | xijun | 1.9 | Bacteria1.12.2_2.0.jar | None | | LC | battletowers | 1.6.4 | BattleTowers-Mod-1.12.2.jar | None | | LC | biomesoplenty | 7.0.1.2441 | BiomesOPlenty-1.12.2-7.0.1.2441-universal.jar | None | | LC | bonfires | 1.2.2 | Bonfires-1.12.2-1.2.2-16eac59.jar | None | | LC | bookshelf | 2.3.585 | Bookshelf-1.12.2-2.3.585.jar | d476d1b22b218a10d845928d1665d45fce301b27 | | LC | buildcraftlib | 7.99.24.1 | buildcraft-all-7.99.24.1.jar | None | | LC | buildcraftcore | 7.99.24.1 | buildcraft-all-7.99.24.1.jar | None | | LC | buildcraftbuilders | 7.99.24.1 | buildcraft-all-7.99.24.1.jar | None | | LC | buildcrafttransport | 7.99.24.1 | buildcraft-all-7.99.24.1.jar | None | | LC | buildcraftsilicon | 7.99.24.1 | buildcraft-all-7.99.24.1.jar | None | | LC | buildcraftcompat | 7.99.24.1 | buildcraft-all-7.99.24.1.jar | None | | LC | buildcraftenergy | 7.99.24.1 | buildcraft-all-7.99.24.1.jar | None | | LC | buildcraftfactory | 7.99.24.1 | buildcraft-all-7.99.24.1.jar | None | | LC | buildcraftrobotics | 7.99.24.1 | buildcraft-all-7.99.24.1.jar | None | | LC | carpentersblocks | 3.4.0-poc.6 | Carpenter's Blocks v3.4.0-poc.6 - MC 1.12.2.jar | None | | LC | cfm | 6.3.0 | cfm-6.3.0-mc1.12.2.jar | None | | LC | redstoneflux | 2.1.0 | RedstoneFlux-1.12-2.1.0.6-universal.jar | 8a6abf2cb9e141b866580d369ba6548732eff25f | | LC | cofhcore | 4.6.3 | CoFHCore-1.12.2-4.6.3.27-universal.jar | None | | LC | cofhworld | 1.3.1 | CoFHWorld-1.12.2-1.3.1.7-universal.jar | 8a6abf2cb9e141b866580d369ba6548732eff25f | | L | communist | 1.0.0 | Communism Mod.jar | None | | L | corpse | 1.12.2-1.0.0 | Corpse-Mod-1.12.2.jar | None | | L | props | 2.6.3 | Decocraft-2.6.3_1.12.2.jar | None | | L | dimdoors | 3.0.9+287 | DimensionalDoors-3.0.9-287.jar | None | | L | eplus | 5.0.176 | Enchanting-Plus-Mod-1.12.2.jar | None | | L | motnt | 1.0.1 | EvenMoreTNT-1.0.1.jar | None | | L | galacticraftcore | 4.0.2.238 | GalacticraftCore-1.12.2-4.0.2.238.jar | None | | L | galacticraftplanets | 4.0.2.238 | Galacticraft-Planets-1.12.2-4.0.2.238.jar | None | | L | mjrlegendslib | 1.12.2-1.1.8 | MJRLegendsLib-1.12.2-1.1.8.jar | None | | L | extraplanets | 1.12.2-0.5.5 | Extra-Planets-Mod-1.12.2.jar | None | | L | ichunutil | 7.2.2 | iChunUtil-1.12.2-7.2.2.jar | None | | L | imsm | 1.12 | Instant-Massive-Structures-Mod-1.12.jar | None | | L | ironchest | 1.12.2-7.0.67.844 | ironchest-1.12.2-7.0.72.847.jar | None | | L | jei | 4.15.0.291 | jei_1.12.2-4.15.0.291.jar | None | | L | lostcities | 2.0.21 | lostcities-1.12-2.0.21.jar | None | | L | lucky | 7.6.0 | Lucky-Block-Mod-1.12.2.zip | None | | L | malisiscore | 1.12.2-6.5.1-SNAPSHOT | MalisisCore-1.12.2.jar | None | | L | malisisadvert | 1.12.2-6.1.0 | MalisisAdvert-Mod-1.12.2.jar | None | | L | malisisdoors | 1.12.2-7.3.0 | MalisisDoors-Mod-1.12.2.jar | None | | L | moarores | 1.1.1 | Moarores-1.1.1.jar | None | | L | moreplanets | 2.0.21 | More-Planets-Mod-1.12.2.jar | None | | L | morph | 7.1.3 | Morph-1.12.2-7.1.3.jar | None | | L | mutantbeasts | 0.3.0 | MutantBeasts-1.12.2-0.3.0.jar | None | | L | scp | 2.1.1 | SCP+Lockdown-1.12.2-2.1.1-beta.jar | None | | L | secretroomsmod | 5.6.4 | Secret-Rooms-Mod-1.12.2.jar | None | | L | lemonlib | 1.3.0 | LemonLib-1.12.2.jar | None | | L | statues | 1.0.1 | Statues-Rechiseled-Mod-1.12.2.jar | None | | L | supertnt | 1.0.1 | Super-TNT-Mod-1.12.2.jar | None | | L | thermalfoundation | 2.6.3 | ThermalFoundation-1.12.2-2.6.3.27-universal.jar | None | | L | trapcraft | v2.4.3a | Trapcraft-Mod-1.12.2.jar | None | | L | twilightforest | 3.9.984 | twilightforest-1.12.2-3.9.984-universal.jar | None | | L | uteamcore | 2.2.4.107 | u_team_core-1.12.2-2.2.4.107.jar | None | | L | usefulbackpacks | 1.5.0.23 | Useful-Backpacks-Mod-1.12.2.jar | None | | L | worldedit | 6.1.10-SNAPSHOT | worldedit-forge-mc1.12.2-6.1.10-SNAPSHOT-dist.jar | None | | L | midnight | 0.3.5 | themidnight-0.3.5.jar | None | Loaded coremods (and transformers): SecretRoomsMod-Core (Secret-Rooms-Mod-1.12.2.jar) com.wynprice.secretroomsmod.core.SecretRoomsTransformer midnight (themidnight-0.3.5.jar) com.mushroom.midnight.core.transformer.MidnightClassTransformer MicdoodlePlugin (MicdoodleCore-1.12.2-4.0.2.238.jar) micdoodle8.mods.miccore.MicdoodleTransformer MalisisCorePlugin (MalisisCore-1.12.2.jar) Profiler Position: N/A (disabled) Is Modded: Definitely; Server brand changed to 'fml,forge' Type: Dedicated Server (map_server.txt) What can I do to fix this problem.

Hi, I am fairly new to Tekkit and recently found a modpack that I really enjoy. I'd like to play it with my friends sometime, but I am not sure how setting up a server with a public modpack works, or if you can do that. I would appreciate it if somebody could direct me to where I can find out how to set up a server with a public modpack, or if somebody could simply tell me that would be nice too. I apologize in advance if this isn't where this topic should go, or if this question has already been answered.

My friends and I have recently been trying to get a Tekkit Legends server up, although we have came to a problem, I can get into the server although my friends however cannot. I have set the Eula to true. I've been using hamachi. This is the message that it comes up with... java.net.ConnectException: Connection timed out:no further information: Server Properties: https://gyazo.com/11def56fc0ba6714f52eeb24f214b1c5 Please Help !!

so i created an attack of the b team server, it worked fine nothing went wrong, then today i went to go on it and at first it said i had no connection to the server, so i refreshed a little and then finally it turned green and said i had connection, so i clicked join server, then it said "connection lost: Bad Login" what do i do, this hasnt happened before. i didnt see any other topics about this but i am really sorry if there is already one that could help me and this isnt just happening with my server, i tried to join a public b team server that i have also previously played on and it said the same thing, is it my serve ror the launcher or both? please help if you can.