Hey there, 
 

I just installed Forge and WorldEdit. First world I create is a superflat. It was okay until I broke a block, although a bit laggy. 

 

Forge is version 1.15.2-forge-31.1.27

WorldEdit is worldedit-forge-mc1.14.4-7.0.1.

 

Could this be a version issue?

I tried on another world and both times I crashed with: 

 

Quote

The game crashed whilst exception in server tick loop Error: java.lang.NoClassDefFoundError: net/minecraft/world/gen/feature/BigTreeFeature

 

Quote

---- Minecraft Crash Report ----
// Quite honestly, I wouldn't worry myself about that.

Time: 3/26/20 7:02 PM
Description: Exception in server tick loop

java.lang.NoClassDefFoundError: net/minecraft/world/gen/feature/BigTreeFeature
    at com.sk89q.worldedit.forge.ForgeWorldEdit.getWorld(ForgeWorldEdit.java:315) ~[?:?] {re:classloading}
    at com.sk89q.worldedit.forge.ForgeWorldEdit.onPlayerInteract(ForgeWorldEdit.java:236) ~[?:?] {re:classloading}
    at net.minecraftforge.eventbus.ASMEventHandler_4_ForgeWorldEdit_onPlayerInteract_PlayerInteractEvent.invoke(.dynamic) ~[?:?] {}
    at net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:80) ~[eventbus-2.0.0-milestone.1-service.jar:?] {}
    at net.minecraftforge.eventbus.EventBus.post(EventBus.java:258) ~[eventbus-2.0.0-milestone.1-service.jar:?] {}
    at net.minecraftforge.common.ForgeHooks.onLeftClickBlock(ForgeHooks.java:780) ~[?:?] {re:classloading}
    at net.minecraft.server.management.PlayerInteractionManager.func_225416_a(PlayerInteractionManager.java:120) ~[?:?] {re:classloading}
    at net.minecraft.network.play.ServerPlayNetHandler.func_147345_a(ServerPlayNetHandler.java:833) ~[?:?] {re:classloading}
    at net.minecraft.network.play.client.CPlayerDiggingPacket.func_148833_a(SourceFile:40) ~[?:?] {re:classloading}
    at net.minecraft.network.play.client.CPlayerDiggingPacket.func_148833_a(SourceFile:10) ~[?:?] {re:classloading}
    at net.minecraft.network.PacketThreadUtil.func_225383_a(SourceFile:21) ~[?:?] {re:classloading}
    at net.minecraft.network.PacketThreadUtil$$Lambda$4861/881357737.run(Unknown Source) ~[?:?] {}
    at net.minecraft.util.concurrent.TickDelayedTask.run(SourceFile:18) ~[?:?] {re:classloading}
    at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213166_h(SourceFile:144) ~[?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.util.concurrent.RecursiveEventLoop.func_213166_h(SourceFile:23) ~[?:?] {re:classloading}
    at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:731) ~[?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:141) ~[?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213168_p(SourceFile:118) ~[?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.server.MinecraftServer.func_213205_aW(MinecraftServer.java:714) ~[?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.server.MinecraftServer.func_213168_p(MinecraftServer.java:708) ~[?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213161_c(SourceFile:127) ~[?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.server.MinecraftServer.func_213202_o(MinecraftServer.java:694) ~[?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:641) [?:?] {re:classloading,pl:accesstransformer:B}
    at java.lang.Thread.run(Thread.java:745) [?:1.8.0_51] {}
Caused by: java.lang.ClassNotFoundException: net.minecraft.world.gen.feature.BigTreeFeature
    at java.lang.ClassLoader.findClass(ClassLoader.java:530) ~[?:1.8.0_51] {}
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_51] {}
    at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:101) ~[modlauncher-5.0.0-milestone.4.jar:?] {}
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_51] {}
    ... 24 more

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
    Minecraft Version: 1.15.2
    Minecraft Version ID: 1.15.2
    Operating System: Windows 7 (amd64) version 6.1
    Java Version: 1.8.0_51, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 1299503008 bytes (1239 MB) / 2147483648 bytes (2048 MB) up to 2147483648 bytes (2048 MB)
    CPUs: 8
    JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
    ModLauncher: 5.0.0-milestone.4+67+b1a340b
    ModLauncher launch target: fmlclient
    ModLauncher naming: srg
    ModLauncher services: 
        /eventbus-2.0.0-milestone.1-service.jar eventbus PLUGINSERVICE 
        /forge-1.15.2-31.1.27.jar object_holder_definalize PLUGINSERVICE 
        /forge-1.15.2-31.1.27.jar runtime_enum_extender PLUGINSERVICE 
        /accesstransformers-2.0.4-shadowed.jar accesstransformer PLUGINSERVICE 
        /forge-1.15.2-31.1.27.jar capability_inject_definalize PLUGINSERVICE 
        /forge-1.15.2-31.1.27.jar runtimedistcleaner PLUGINSERVICE 
        /forge-1.15.2-31.1.27.jar fml TRANSFORMATIONSERVICE 
    FML: 31.1
    Forge: net.minecraftforge:31.1.27
    FML Language Providers: 
        [email protected]
        minecraft@1
    Mod List: 
        forge-1.15.2-31.1.27-client.jar Minecraft {[email protected] DONE}
        forge-1.15.2-31.1.27-universal.jar Forge {[email protected] DONE}
        worldedit-forge-mc1.14.4-7.0.1.jar WorldEdit {[email protected];61bc012 DONE}
    Player Count: 1 / 8; [ServerPlayerEntity['aghostdream'/1, l='New World', x=19.00, y=4.00, z=-164.32]]
    Data Packs: vanilla, mod:forge (incompatible), mod:worldedit (incompatible)
    Type: Integrated Server (map_client.txt)
    Is Modded: Definitely; Client brand changed to 'forge'

 

Well, embarassing, but, yeah it was a version issue. 

 

4 minutes ago, CozyGhost said:

Could this be a version issue?

 

i have the same problem with the recommended version of forge and i cant use any of the worldedit commands aswell

Edited April 14, 20205 yr by Meluna
had to add something