Minecraft Forums

I'm new to modding, and I'm trying to do a custom modpack on twitch. It keeps crashing on startup, which I kinda expected. I've common-sensed my way through some issues (deleting mods with duplicate files kind of thing). Problem is, I am now getting error messages I don't even know how to read. Well, I can tell when the crash report is calling me a dumbass. Can someone walk me through what I'm looking at here? Or alternatively, point me in the direction of some resources so I can learn it myself?

---- Minecraft Crash Report ----

WARNING: coremods are present:
AstralCore (astralsorcery-1.12.2-1.10.3.jar)
llibrary (llibrary-core-1.0.10-1.12.2.jar)
EnderCorePlugin (EnderCore-1.12.2-0.5.43.jar)
IELoadingPlugin (ImmersiveEngineering-core-0.12-86.jar)
LibrarianLib Plugin (librarianlib-1.12.2-4.15.jar)
AdvancedRocketryPlugin (AdvancedRocketry-1.12.2-1.4.1-115-universal.jar)
ForgelinPlugin (Forgelin-1.8.2.jar)
CTMCorePlugin (CTM-MC1.12.2-0.3.3.22.jar)
Contact their authors BEFORE contacting forge

// Why did you do that?

Time: 12/7/18 1:12 PM
Description: Initializing game

java.lang.RuntimeException: java.lang.NoSuchFieldException: ENTITY_DRAGON_BREATHSTART
at net.minecraftforge.registries.ObjectHolderRegistry.scanTarget(ObjectHolderRegistry.java:137)
at net.minecraftforge.registries.ObjectHolderRegistry.findObjectHolders(ObjectHolderRegistry.java:80)
at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:624)
at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:252)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:467)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:378)
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)
Caused by: java.lang.NoSuchFieldException: ENTITY_DRAGON_BREATHSTART
at java.lang.Class.getDeclaredField(Class.java:2070)
at net.minecraftforge.registries.ObjectHolderRegistry.scanTarget(ObjectHolderRegistry.java:131)
... 12 more

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

-- Head --
Thread: Client thread
Stacktrace:
at net.minecraftforge.registries.ObjectHolderRegistry.scanTarget(ObjectHolderRegistry.java:137)
at net.minecraftforge.registries.ObjectHolderRegistry.findObjectHolders(ObjectHolderRegistry.java:80)
at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:624)
at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:252)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:467)

-- Initialization --
Details:
Stacktrace:
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:378)
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: 1018711288 bytes (971 MB) / 1538785280 bytes (1467 MB) up to 2863661056 bytes (2731 MB)
JVM Flags: 4 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx3072m -Xms256m -XX:PermSize=256m
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP 9.42 Powered by Forge 14.23.5.2795 83 mods loaded, 83 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-1.12.2-14.23.5.2795.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 |
| LC | forge | 14.23.5.2795 | forge-1.12.2-14.23.5.2795.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 |
| LC | advancedrocketrycore | 1 | minecraft.jar | None |
| LC | libvulpes | 0.3.0.-45 | LibVulpes-1.12.2-0.3.0-45-universal.jar | None |
| LC | advancedrocketry | 1.4.1.-115 | AdvancedRocketry-1.12.2-1.4.1-115-universal.jar | None |
| LC | baubles | 1.5.2 | Baubles-1.12-1.5.2.jar | None |
| LC | astralsorcery | 1.10.3 | astralsorcery-1.12.2-1.10.3.jar | a0f0b759d895c15ceb3e3bcb5f3c2db7c582edf0 |
| LC | bdlib | 1.14.3.12 | bdlib-1.14.3.12-mc1.12.2.jar | None |
| LC | betterbuilderswands | 0.11.1 | BetterBuildersWands-1.12-0.11.1.245+69d0d70.jar | None |
| LC | bonsaitrees | 1.1.1 | bonsaitrees-1.1.1-b138.jar | None |
| LC | codechickenlib | 3.2.2.353 | CodeChickenLib-1.12.2-3.2.2.353-universal.jar | f1850c39b2516232a2108a7bd84d1cb5df93b261 |
| LC | redstoneflux | 2.1.0 | RedstoneFlux-1.12-2.1.0.6-universal.jar | 8a6abf2cb9e141b866580d369ba6548732eff25f |
| LC | brandonscore | 2.4.8 | BrandonsCore-1.12.2-2.4.8.194-universal.jar | None |
| LC | ceramics | 1.12-1.3.6 | Ceramics-1.12-1.3.6.jar | None |
| LC | chickenchunks | 2.4.1.73 | ChickenChunks-1.12.2-2.4.1.73-universal.jar | f1850c39b2516232a2108a7bd84d1cb5df93b261 |
| LC | chickens | 6.0.4 | chickens-6.0.4.jar | None |
| LC | ctm | MC1.12.2-0.3.3.22 | CTM-MC1.12.2-0.3.3.22.jar | None |
| LC | chisel | MC1.12.2-0.2.1.35 | Chisel-MC1.12.2-0.2.1.35.jar | None |
| LC | forgelin | 1.8.2 | Forgelin-1.8.2.jar | None |
| LC | librarianlib | 4.15 | librarianlib-1.12.2-4.15.jar | None |
| LC | classyhats | %VERSION% | ClassyHats-1.5.jar | None |
| LC | cyclopscore | 0.11.11 | CyclopsCore-1.12.2-0.11.11.jar | bd0353b3e8a2810d60dd584e256e364bc3bedd44 |
| LC | commoncapabilities | 1.4.0 | CommonCapabilities-1.12-1.4.0.jar | None |
| LC | computercraft | 1.80pr1 | ComputerCraft1.80pr1.jar | None |
| LC | draconicevolution | 2.3.17 | Draconic-Evolution-1.12.2-2.3.17.321-universal.jar | None |
| LC | llibrary | 1.7.17 | llibrary-1.7.17-1.12.2.jar | b9f30a813bee3b9dd5652c460310cfcd54f6b7ec |
| LC | dragonmounts | 1.12.2-1.4.8.9 | DragonMounts-1.12.2-1.4.8.9.jar | None |
| LC | dragonwingselytra | 1.1.0 | DragonWingsElytra-v1.1.0.jar | None |
| LC | endercompass | 1.2.6.2 | EnderCompass-1.12-1.2.6.2.jar | None |
| LC | endercore | 1.12.2-0.5.43 | EnderCore-1.12.2-0.5.43.jar | None |
| LC | jei | 4.13.1.225 | jei_1.12.2-4.13.1.225.jar | None |
| LC | enderio | 5.0.38 | EnderIO-1.12.2-5.0.38.jar | None |
| LC | enderiointegrationtic | 5.0.38 | EnderIO-1.12.2-5.0.38.jar | None |
| LC | enderiobase | 5.0.38 | EnderIO-1.12.2-5.0.38.jar | None |
| LC | enderioconduits | 5.0.38 | EnderIO-1.12.2-5.0.38.jar | None |
| LC | enderioconduitsappliedenergistics | 5.0.38 | EnderIO-1.12.2-5.0.38.jar | None |
| LC | enderioconduitsopencomputers | 5.0.38 | EnderIO-1.12.2-5.0.38.jar | None |
| LC | refinedstorage | 1.6.12 | refinedstorage-1.6.12.jar | 57893d5b90a7336e8c63fe1c1e1ce472c3d59578 |
| LC | enderioconduitsrefinedstorage | 5.0.38 | EnderIO-1.12.2-5.0.38.jar | None |
| LC | forestry | 5.8.1.322 | forestry_1.12.2-5.8.1.322.jar | None |
| LC | enderiointegrationforestry | 5.0.38 | EnderIO-1.12.2-5.0.38.jar | None |
| LC | enderiointegrationticlate | 5.0.38 | EnderIO-1.12.2-5.0.38.jar | None |
| LC | enderiomachines | 5.0.38 | EnderIO-1.12.2-5.0.38.jar | None |
| LC | enderiopowertools | 5.0.38 | EnderIO-1.12.2-5.0.38.jar | None |
| LC | enderiozoo | 5.0.38 | EnderIO-zoo-1.12.2-5.0.38.jar | None |
| LC | enderstorage | 2.4.5.135 | EnderStorage-1.12.2-2.4.5.135-universal.jar | f1850c39b2516232a2108a7bd84d1cb5df93b261 |
| LC | equaldragons | 1.1 | EqualDragons-1.1.jar | None |
| LC | exnihilocreatio | 1.12-0.2.4 | exnihilocreatio-1.12-0.2.4.jar | None |
| LC | excompressum | 3.0.26 | ExCompressum_1.12.2-3.0.26.jar | None |
| LC | forgemultipartcbe | 2.6.0.79 | ForgeMultipart-1.12.2-2.6.0.79-universal.jar | f1850c39b2516232a2108a7bd84d1cb5df93b261 |
| LC | microblockcbe | 2.6.0.79 | ForgeMultipart-1.12.2-2.6.0.79-universal.jar | None |
| LC | minecraftmultipartcbe | 2.6.0.79 | ForgeMultipart-1.12.2-2.6.0.79-universal.jar | None |
| LC | gendustry | 1.6.5.8 | gendustry-1.6.5.8-mc1.12.2.jar | None |
| LC | gendustryjei | 1.0.2 | gendustryjei-1.0.2.jar | None |
| LC | hatchery | 2.1.4 | hatchery-1.12.2-2.1.4.jar | None |
| LC | ichunutil | 7.1.4 | iChunUtil-1.12.2-7.1.4.jar | None |
| LC | hats | 7.0.0 | Hats-1.12.2-7.0.2.jar | None |
| LC | iceandfire | 1.5.2 | iceandfire-1.5.2.jar | None |
| LC | integrateddynamics | 0.11.18 | IntegratedDynamics-1.12.2-0.11.18.jar | bd0353b3e8a2810d60dd584e256e364bc3bedd44 |
| LC | integrateddynamicscompat | 1.0.0 | IntegratedDynamics-1.12.2-0.11.18.jar | None |
| LC | integratedtunnels | 1.5.6 | IntegratedTunnels-1.12.2-1.5.6.jar | bd0353b3e8a2810d60dd584e256e364bc3bedd44 |
| LC | integratedtunnelscompat | 1.0.0 | IntegratedTunnels-1.12.2-1.5.6.jar | None |
| LC | journeymap | 1.12.2-5.5.3 | journeymap-1.12.2-5.5.3.jar | None |
| LC | lostcities | 2.0.12 | lostcities-1.12-2.0.12.jar | None |
| LC | mcjtylib_ng | 3.0.7 | mcjtylib-1.12-3.0.7.jar | None |
| LC | millenaire | Millénaire 7.1.0 | millenaire-1.12.2-7.1.0.jar | None |
| LC | twilightforest | 3.8.689 | twilightforest-1.12.2-3.8.689-universal.jar | None |
| LC | immersiveengineering | 0.12-86 | ImmersiveEngineering-0.12-86.jar | 4cb49fcde3b43048c9889e0a3d083225da926334 |
| LC | morechickens | 3.1.0 | morechickens-1.12.2-3.1.0.jar | None |
| LC | mousetweaks | 2.9 | MouseTweaks-2.9-mc1.12.2.jar | None |
| LC | refinedstorageaddons | 0.4.3 | refinedstorageaddons-0.4.3.jar | None |
| LC | rftools | 7.59 | rftools-1.12-7.59.jar | None |
| LC | rotd | 1.7.3 | ROTD-1.12.2- 1.7.4.jar | None |
| LC | shearmadness | 1.12.2 | shearmadness-1.12.2-1.7.2.4.jar | None |
| LC | solarflux | 4.16r | SolarFluxReborn_1.12.2-4.16r.jar | 4d7b29cd19124e986da685107d16ce4b49bc0a97 |
| LC | teaandbiscuits | 1.4 | TeaAndBiscuits-1.12.2-1.4.jar | None |
| LC | tipthescales | 1.0.1 | TipTheScales-1.12.2-1.0.1.jar | None |
| LC | translocators | 2.5.1.77 | Translocators-1.12.2-2.5.1.77-universal.jar | f1850c39b2516232a2108a7bd84d1cb5df93b261 |
| LC | traverse | 1.6.0 | Traverse-1.12.2-1.6.0-69.jar | None |
| LC | vc | 5.9.13 | ViesCraft-1.12.2-5.9.13.jar | None |
| LC | librarianliblate | 4.15 | librarianlib-1.12.2-4.15.jar | None |

Loaded coremods (and transformers):
AstralCore (astralsorcery-1.12.2-1.10.3.jar)

llibrary (llibrary-core-1.0.10-1.12.2.jar)
net.ilexiconn.llibrary.server.core.plugin.LLibraryTransformer
net.ilexiconn.llibrary.server.core.patcher.LLibraryRuntimePatcher
EnderCorePlugin (EnderCore-1.12.2-0.5.43.jar)
com.enderio.core.common.transform.EnderCoreTransformer
com.enderio.core.common.transform.SimpleMixinPatcher
IELoadingPlugin (ImmersiveEngineering-core-0.12-86.jar)
blusunrize.immersiveengineering.common.asm.IEClassTransformer
LibrarianLib Plugin (librarianlib-1.12.2-4.15.jar)
com.teamwizardry.librarianlib.asm.LibLibTransformer
AdvancedRocketryPlugin (AdvancedRocketry-1.12.2-1.4.1-115-universal.jar)
zmaster587.advancedRocketry.asm.ClassTransformer
ForgelinPlugin (Forgelin-1.8.2.jar)

CTMCorePlugin (CTM-MC1.12.2-0.3.3.22.jar)
team.chisel.ctm.client.asm.CTMTransformer
GL info: ' Vendor: 'NVIDIA Corporation' Version: '4.6.0 NVIDIA 388.13' Renderer: 'GeForce GTX 960/PCIe/SSE2'
Launched Version: forge-14.23.5.2795
LWJGL: 2.9.4
OpenGL: GeForce GTX 960/PCIe/SSE2 GL version 4.6.0 NVIDIA 388.13, 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:
Current Language: English (US)
Profiler Position: N/A (disabled)
CPU: 8x AMD FX(tm)-8350 Eight-Core Processor