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Hi I got this error when playing on my minecraft server with forge.

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Posted September 17, 20214 yr

---- Minecraft Crash Report ----

WARNING: coremods are present:
llibrary (llibrary-core-1.0.11-1.12.2.jar)
McLib core mod (mclib-2.3.5-1.12.2.jar)
AstralCore (astralsorcery-1.12.2-1.10.27.jar)
midnight (themidnight-0.3.5.jar)
ItemPatchingLoader (ItemPhysic_Full_1.4.34_mc1.12.2.jar)
MalisisCorePlugin (malisiscore-1.12.2-6.5.1.jar)
CreativePatchingLoader (CreativeCore_v1.10.63_mc1.12.2.jar)
Contact their authors BEFORE contacting forge

// You're mean.

Time: 9/16/21 6:40 PM
Description: Ticking entity

java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.Boolean
   at drzhark.mocreatures.entity.MoCEntityTameableAquatic.getIsTamed(MoCEntityTameableAquatic.java:89)
   at drzhark.mocreatures.entity.MoCEntityTameableAquatic.func_70094_T(MoCEntityTameableAquatic.java:452)
   at net.minecraft.entity.EntityLivingBase.func_70030_z(EntityLivingBase.java:232)
   at net.minecraft.entity.EntityLiving.func_70030_z(EntityLiving.java:269)
   at drzhark.mocreatures.entity.MoCEntityAquatic.func_70030_z(MoCEntityAquatic.java:914)
   at net.minecraft.entity.Entity.func_70071_h_(Entity.java:389)
   at net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:2096)
   at net.minecraft.entity.EntityLiving.func_70071_h_(EntityLiving.java:377)
   at net.minecraft.world.World.func_72866_a(World.java:1996)
   at net.minecraft.world.World.func_72870_g(World.java:1958)
   at net.minecraft.world.World.func_72939_s(World.java:1762)
   at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1847)
   at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1098)
   at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:398)
   at net.minecraft.client.main.Main.main(SourceFile:123)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:497)
   at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
   at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

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

-- Head --
Thread: Client thread
Stacktrace:
   at drzhark.mocreatures.entity.MoCEntityTameableAquatic.getIsTamed(MoCEntityTameableAquatic.java:89)
   at drzhark.mocreatures.entity.MoCEntityTameableAquatic.func_70094_T(MoCEntityTameableAquatic.java:452)
   at net.minecraft.entity.EntityLivingBase.func_70030_z(EntityLivingBase.java:232)
   at net.minecraft.entity.EntityLiving.func_70030_z(EntityLiving.java:269)
   at drzhark.mocreatures.entity.MoCEntityAquatic.func_70030_z(MoCEntityAquatic.java:914)
   at net.minecraft.entity.Entity.func_70071_h_(Entity.java:389)
   at net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:2096)
   at net.minecraft.entity.EntityLiving.func_70071_h_(EntityLiving.java:377)
   at net.minecraft.world.World.func_72866_a(World.java:1996)
   at net.minecraft.world.World.func_72870_g(World.java:1958)

-- Entity being ticked --
Details:
   Entity Type: mocreatures:anchovy (drzhark.mocreatures.entity.aquatic.MoCEntityAnchovy)
   Entity ID: 812
   Entity Name: Anchovy
   Entity's Exact location: -226.50, 52.00, 68.50
   Entity's Block location: World: (-227,52,68), Chunk: (at 13,3,4 in -15,4; contains blocks -240,0,64 to -225,255,79), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
   Entity's Momentum: 0.00, 0.00, 0.00
   Entity's Passengers: []
   Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
   at net.minecraft.world.World.func_72939_s(World.java:1762)

-- Affected level --
Details:
   Level name: MpServer
   All players: 1 total; [EntityPlayerSP['Spylux'/329, l='MpServer', x=-196.19, y=68.75, z=85.14]]
   Chunk stats: MultiplayerChunkCache: 441, 441
   Level seed: 0
   Level generator: ID 06 - BIOMESOP, ver 0. Features enabled: false
   Level generator options:
   Level spawn location: World: (-246,64,177), Chunk: (at 10,4,1 in -16,11; contains blocks -256,0,176 to -241,255,191), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
   Level time: 19600 game time, 19600 day time
   Level dimension: 0
   Level storage version: 0x00000 - Unknown?
   Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
   Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
   Forced entities: 56 total; [EntityPlayerSP['Spylux'/329, l='MpServer', x=-196.19, y=68.75, z=85.14], EntityLatchedRenderer['unknown'/1, l='MpServer', x=8.50, y=65.00, z=8.50], EntitySunstrike['entity.sunstrike.name'/769, l='MpServer', x=-190.50, y=67.06, z=102.50], EntityHat['unknown'/2, l='MpServer', x=8.50, y=65.00, z=8.50], EntitySunstrike['entity.sunstrike.name'/770, l='MpServer', x=-184.50, y=68.06, z=105.50], EntitySunstrike['entity.sunstrike.name'/774, l='MpServer', x=-183.50, y=72.06, z=122.50], EntitySunstrike['entity.sunstrike.name'/777, l='MpServer', x=-195.50, y=71.06, z=105.50], EntityRift['Midnight Rift'/790, l='MpServer', x=-163.50, y=41.50, z=131.50], EntityRabbit['Rabbit'/409, l='MpServer', x=-165.64, y=67.00, z=37.52], EntityRabbit['Rabbit'/410, l='MpServer', x=-166.68, y=66.00, z=39.48], EntitySunstrike['entity.sunstrike.name'/794, l='MpServer', x=-198.50, y=67.06, z=94.50], MoCEntityAnt['Ant'/158, l='MpServer', x=-257.51, y=67.00, z=85.03], MoCEntityAnt['Ant'/670, l='MpServer', x=-195.25, y=71.00, z=41.03], MoCEntityGrizzlyBear['GrizzlyBear'/161, l='MpServer', x=-258.00, y=68.00, z=123.94], EntityGreatWhiteShark['Great White Shark'/546, l='MpServer', x=-193.10, y=57.00, z=138.27], EntityBat['Bat'/810, l='MpServer', x=-158.50, y=28.00, z=109.50], MoCEntityAnchovy['Anchovy'/812, l='MpServer', x=-226.50, y=52.00, z=68.50], EntityBooby['Booby'/174, l='MpServer', x=-254.10, y=71.00, z=139.31], EntityOctopus['Octopus'/435, l='MpServer', x=-232.34, y=52.00, z=152.77], EntityOctopus['Octopus'/436, l='MpServer', x=-228.06, y=53.00, z=147.62], EntityHat['unknown'/53, l='MpServer', x=-196.24, y=68.42, z=85.49], EntitySunstrike['entity.sunstrike.name'/694, l='MpServer', x=-201.50, y=66.06, z=101.50], EntitySunstrike['entity.sunstrike.name'/696, l='MpServer', x=-208.50, y=66.06, z=80.50], EntitySunstrike['entity.sunstrike.name'/698, l='MpServer', x=-202.50, y=68.06, z=75.50], EntitySunstrike['entity.sunstrike.name'/699, l='MpServer', x=-194.50, y=68.06, z=70.50], EntityClownFish['Clownfish'/190, l='MpServer', x=-247.58, y=62.00, z=89.42], EntityTropicalFish['Marine Tang'/191, l='MpServer', x=-219.48, y=62.00, z=145.83], EntityClownFish['Clownfish'/192, l='MpServer', x=-237.58, y=62.00, z=80.42], EntityMimic['Mimic'/193, l='MpServer', x=-228.50, y=37.00, z=124.50], EntitySkeleton['Skeleton'/194, l='MpServer', x=-232.54, y=46.00, z=128.73], EntitySkeleton['Skeleton'/709, l='MpServer', x=-167.50, y=22.00, z=76.50], EntityMimic['Mimic'/210, l='MpServer', x=-216.50, y=19.00, z=72.50], EntityTropicalFish['Marine Tang'/211, l='MpServer', x=-229.58, y=62.05, z=69.42], EntityOctopus['Octopus'/214, l='MpServer', x=-205.71, y=51.00, z=145.01], EntityOctopus['Octopus'/215, l='MpServer', x=-203.38, y=51.00, z=144.65], EntityMimic['Mimic'/221, l='MpServer', x=-207.50, y=37.00, z=92.50], EntityBarakoaya['Barakoa'/222, l='MpServer', x=-196.13, y=67.18, z=99.85], EntityBarakoaya['Barakoa'/223, l='MpServer', x=-193.60, y=67.00, z=105.99], EntityMorayEel['Moray Eel'/224, l='MpServer', x=-192.89, y=56.72, z=131.67], EntityCichlid['Cichlid'/225, l='MpServer', x=-185.72, y=61.60, z=132.86], EntityMimic['Mimic'/357, l='MpServer', x=-136.50, y=45.00, z=28.50], EntityBarakoaya['Barakoa'/230, l='MpServer', x=-180.62, y=62.01, z=95.59], EntityBat['Bat'/742, l='MpServer', x=-199.08, y=24.35, z=104.64], EntityBarakoaya['Barakoa'/231, l='MpServer', x=-187.70, y=67.00, z=90.96], EntityBarakoaya['Barakoa'/232, l='MpServer', x=-181.70, y=62.34, z=99.47], EntityBarakoaya['Barakoa'/233, l='MpServer', x=-195.96, y=67.43, z=101.19], EntityBarakoaya['Barakoa'/234, l='MpServer', x=-196.49, y=67.26, z=97.72], EntityBarakoaya['Barakoa'/235, l='MpServer', x=-196.84, y=67.08, z=100.26], EntityBarakoaya['Barakoa'/236, l='MpServer', x=-196.65, y=67.03, z=96.34], EntityBarako['Barako, the Sun Chief'/237, l='MpServer', x=-183.50, y=71.50, z=122.50], EntityHat['unknown'/239, l='MpServer', x=-198.83, y=24.29, z=104.54], EntityBarakoaya['Barakoa'/243, l='MpServer', x=-173.70, y=62.21, z=111.43], EntitySunstrike['entity.sunstrike.name'/758, l='MpServer', x=-182.50, y=66.06, z=85.50], EntityHat['unknown'/249, l='MpServer', x=-232.54, y=46.00, z=128.73], EntityItem['item.item.seeds'/638, l='MpServer', x=-246.90, y=67.00, z=79.46], EntitySunstrike['entity.sunstrike.name'/767, l='MpServer', x=-187.50, y=67.06, z=101.50]]
   Retry entities: 2 total; [EntityLatchedRenderer['unknown'/1, l='MpServer', x=8.50, y=65.00, z=8.50], EntityHat['unknown'/2, l='MpServer', x=8.50, y=65.00, z=8.50]]
   Server brand: Mohist
   Server type: Non-integrated multiplayer server
Stacktrace:
   at net.minecraft.client.multiplayer.WorldClient.func_72914_a(WorldClient.java:532)
   at net.minecraft.client.Minecraft.func_71396_d(Minecraft.java:2741)
   at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:419)
   at net.minecraft.client.main.Main.main(SourceFile:123)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:497)
   at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
   at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
   Minecraft Version: 1.12.2
   Operating System: Windows 10 (amd64) version 10.0
   Java Version: 1.8.0_51, Oracle Corporation
   Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
   Memory: 1611497768 bytes (1536 MB) / 3690987520 bytes (3520 MB) up to 5368709120 bytes (5120 MB)
   JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx5G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
   IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
   FML: MCP 9.42 Powered by Forge 14.23.5.2855 Optifine OptiFine_1.12.2_HD_U_G5 67 mods loaded, 66 mods active
   States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored

   Loaded coremods (and transformers):
llibrary (llibrary-core-1.0.11-1.12.2.jar)
net.ilexiconn.llibrary.server.core.plugin.LLibraryTransformer
net.ilexiconn.llibrary.server.core.patcher.LLibraryRuntimePatcher
McLib core mod (mclib-2.3.5-1.12.2.jar)
mchorse.mclib.core.McLibCMClassTransformer
AstralCore (astralsorcery-1.12.2-1.10.27.jar)

midnight (themidnight-0.3.5.jar)
com.mushroom.midnight.core.transformer.MidnightClassTransformer
ItemPatchingLoader (ItemPhysic_Full_1.4.34_mc1.12.2.jar)
com.creativemd.itemphysic.ItemTransformer
MalisisCorePlugin (malisiscore-1.12.2-6.5.1.jar)

CreativePatchingLoader (CreativeCore_v1.10.63_mc1.12.2.jar)

   GL info: ' Vendor: 'NVIDIA Corporation' Version: '4.6.0 NVIDIA 471.68' Renderer: 'NVIDIA GeForce RTX 2060/PCIe/SSE2'
   Launched Version: 1.12.2-forge-14.23.5.2855
   LWJGL: 2.9.4
   OpenGL: NVIDIA GeForce RTX 2060/PCIe/SSE2 GL version 4.6.0 NVIDIA 471.68, NVIDIA Corporation
   GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

   Using VBOs: Yes
   Is Modded: Definitely; Client brand changed to 'fml,forge'
   Type: Client (map_client.txt)
   Resource Packs: vanilla
   Current Language: English (US)
   Profiler Position: N/A (disabled)
   CPU: 8x AMD Ryzen 7 3750H with Radeon Vega Mobile Gfx
   OptiFine Version: OptiFine_1.12.2_HD_U_G5
   OptiFine Build: 20210124-142939
   Render Distance Chunks: 8
   Mipmaps: 4
   Anisotropic Filtering: 1
   Antialiasing: 0
   Multitexture: false
   Shaders: null
   OpenGlVersion: 4.6.0 NVIDIA 471.68
   OpenGlRenderer: NVIDIA GeForce RTX 2060/PCIe/SSE2
   OpenGlVendor: NVIDIA Corporation
   CpuCount: 8

September 17, 20214 yr

1.12 is no longer supported on this forum.

Please update to a modern version of Minecraft to receive support.

This is my Forum Signature, I am currently attempting to transform it into a small guide for fixing easier issues using spoiler blocks to keep things tidy.

As the most common issue I feel I should put this outside the main bulk:

The only official source for Forge is https://files.minecraftforge.net, and the only site I trust for getting mods is CurseForge.

If you use any site other than these, please take a look at the StopModReposts project and install their browser extension, I would also advise running a virus scan.

For players asking for assistance with Forge please expand the spoiler below and read the appropriate section(s) in its/their entirety.

Spoiler

Logs (Most issues require logs to diagnose):

Spoiler

Please post logs using one of the following sites (Thank you Lumber Wizard for the list):

https://gist.github.com/: 100MB Requires member (Free)

https://pastebin.com/: 512KB as guest, 10MB as Pro ($$$)

https://hastebin.com/: 400KB

Do NOT use sites like Mediafire, Dropbox, OneDrive, Google Drive, or a site that has a countdown before offering downloads.

What to provide:

...for Crashes and Runtime issues:

Minecraft 1.14.4 and newer:

Post debug.log

Older versions:

Please update...

...for Installer Issues:

Post your installer log, found in the same place you ran the installer

This log will be called either installer.log or named the same as the installer but with .log on the end

Note for Windows users:

Windows hides file extensions by default so the installer may appear without the .jar extension then when the .log is added the log will appear with the .jar extension

Where to get it:

Mojang Launcher: When using the Mojang launcher debug.log is found in .minecraft\logs.

Curse/Overwolf: If you are using the Curse Launcher, their configurations break Forge's log settings, fortunately there is an easier workaround than I originally thought, this works even with Curse's installation of the Minecraft launcher as long as it is not launched THROUGH Twitch:

Spoiler

Make sure you have the correct version of Forge installed (some packs are heavily dependent on one specific build of Forge)
Make a launcher profile targeting this version of Forge.
Set the launcher profile's GameDir property to the pack's instance folder (not the instances folder, the folder that has the pack's name on it).
Now launch the pack through that profile and follow the "Mojang Launcher" instructions above.

Video:

Spoiler

or alternately,

Fallback ("No logs are generated"):

If you don't see logs generated in the usual place, provide the launcher_log.txt from .minecraft

Server Not Starting:

Spoiler

If your server does not start or a command window appears and immediately goes away, run the jar manually and provide the output.

Reporting Illegal/Inappropriate Adfocus Ads:

Spoiler

Get a screenshot of the URL bar or copy/paste the whole URL into a thread on the General Discussion board with a description of the Ad.

Lex will need the Ad ID contained in that URL to report it to Adfocus' support team.

Posting your mod as a GitHub Repo:

Spoiler

When you have an issue with your mod the most helpful thing you can do when asking for help is to provide your code to those helping you. The most convenient way to do this is via GitHub or another source control hub.

When setting up a GitHub Repo it might seem easy to just upload everything, however this method has the potential for mistakes that could lead to trouble later on, it is recommended to use a Git client or to get comfortable with the Git command line. The following instructions will use the Git Command Line and as such they assume you already have it installed and that you have created a repository.

Open a command prompt (CMD, Powershell, Terminal, etc).
Navigate to the folder you extracted Forge’s MDK to (the one that had all the licenses in).
Run the following commands:
1. git init
2. git remote add origin [Your Repository's URL]
  - In the case of GitHub it should look like: https://GitHub.com/[Your Username]/[Repo Name].git
3. git fetch
4. git checkout --track origin/master
5. git stage *
6. git commit -m "[Your commit message]"
7. git push
Navigate to GitHub and you should now see most of the files.
- note that it is intentional that some are not synced with GitHub and this is done with the (hidden) .gitignore file that Forge’s MDK has provided (hence the strictness on which folder git init is run from)
Now you can share your GitHub link with those who you are asking for help.

[Workaround line, please ignore]

This topic is now closed to further replies.

https://forums.minecraftforge.net/topic/104489-hi-i-got-this-error-when-playing-on-my-minecraft-server-with-forge/

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Mods not showing

Please explain "downloading some mod via forge", do you mean downloading mods from Curseforge?

Which version of Minecraft?

Please read the FAQ and post logs as described there, as it will give some details that might explain what is going on.

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I have the same error. Did you get this sorted?

By Googlesearch · 6 hours ago6 hr
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Hello, me and my friend are trying to play Deceasedcraft latest version 1.20.1 forge: 47.4.0 but it crashes immediately for him but not me, i can open it. He has Java 25 the latest version, latest GPU drivers for his rtx3050 and even after making a complete new installation with no mods it crashes with Exit code 1. We tried every thing pls help.

By pirateinthesky · Posted 12 hours ago12 hr
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Hi,
recently i've tried downloading some mod via forge, installed forge on the minecraft launcher and put my mods inside the mod folder that i opened via the game. But they wont show, i tried different mods but any of them want to pop up, any ideas?

By RankoJail · Posted 12 hours ago12 hr

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Hi I got this error when playing on my minecraft server with forge.

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