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Posted (edited)

I am trying to make a modpack for my brother and I to play, but I'm running into this weird error. I doesn't appear to have anything to do with any mods, but it just crashes. I know it has something to do with Half Slab Blocks, but that's as far as I could get.

---- Minecraft Crash Report ----
// Why is it breaking 

Time: 8/26/14 10:21 PM
Description: Initializing game

java.lang.NoClassDefFoundError: net/minecraft/block/BlockHalfSlab
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Unknown Source)
	at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:420)
	at sun.reflect.GeneratedMethodAccessor3.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:208)
	at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:187)
	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:118)
	at cpw.mods.fml.common.Loader.loadMods(Loader.java:492)
	at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:204)
	at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:480)
	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:867)
	at net.minecraft.client.main.Main.main(SourceFile:148)
	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 net.minecraft.launchwrapper.Launch.launch(Launch.java:134)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.ClassNotFoundException: net.minecraft.block.BlockHalfSlab
	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:188)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	... 34 more
Caused by: java.lang.NullPointerException


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

-- Head --
Stacktrace:
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Unknown Source)
	at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:420)
	at sun.reflect.GeneratedMethodAccessor3.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:208)
	at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:187)
	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:118)
	at cpw.mods.fml.common.Loader.loadMods(Loader.java:492)
	at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:204)
	at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:480)

-- Initialization --
Details:
Stacktrace:
	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:867)
	at net.minecraft.client.main.Main.main(SourceFile:148)
	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 net.minecraft.launchwrapper.Launch.launch(Launch.java:134)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
	Minecraft Version: 1.7.10
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_21, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 251747216 bytes (240 MB) / 874446848 bytes (833 MB) up to 1908932608 bytes (1820 MB)
	JVM Flags: 3 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2048m -XX:MaxPermSize=256m
	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 v7.10.25.1208 Minecraft Forge 10.13.0.1208 88 mods loaded, 88 mods active
	mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed
	FML{7.10.25.1208} [Forge Mod Loader] (modpack.jar) Unloaded->Constructed
	Forge{10.13.0.1208} [Minecraft Forge] (modpack.jar) Unloaded->Constructed
	AppliedEnergistics2-Core{rv0-stable-10} [AppliedEnergistics2 Core] (minecraft.jar) Unloaded->Constructed
	CodeChickenCore{1.0.2.9} [CodeChicken Core] (minecraft.jar) Unloaded->Constructed
	<CoFH ASM>{000} [CoFH ASM Data Initialization] (minecraft.jar) Unloaded->Constructed
	MCVanillaTweaks{1.0} [Mariculture - Vanilla Tweaks] (minecraft.jar) Unloaded->Constructed
	Micdoodlecore{} [Micdoodle8 Core] (minecraft.jar) Unloaded->Constructed
	NotEnoughItems{1.0.2.15} [Not Enough Items] (NotEnoughItems-1.7.10-1.0.2.15-universal.jar) Unloaded->Constructed
	TConstruct-Preloader{0.1.1} [Tinkers Corestruct] (minecraft.jar) Unloaded->Constructed
	coloredlightscore{1.1.2} [Colored Lights Core] (minecraft.jar) Unloaded->Constructed
	bspkrsCore{6.12} [bspkrsCore] ([1.7.10]bspkrsCore-universal-6.12.jar) Unloaded->Constructed
	ArmorStatusHUD{1.27} [ArmorStatusHUD] ([1.7.10]ArmorStatusHUD-client-1.27.jar) Unloaded->Constructed
	DamageIndicatorsMod{3.2.0} [Damage Indicators] ([1.7.10]DamageIndicatorsMod-3.2.0.jar) Unloaded->Constructed
	StatusEffectHUD{1.26} [StatusEffectHUD] ([1.7.10]StatusEffectHUD-client-1.26.jar) Unloaded->Constructed
	Treecapitator{1.7.2} [Treecapitator] ([1.7.2]Treecapitator-universal-2.0.3.jar) Unloaded->Constructed
	IC2{2.2.621-experimental} [IndustrialCraft 2] (industrialcraft-2-2.2.621-experimental.jar) Unloaded->Constructed
	ImmibisCore{59.0.1} [Immibis Core] (immibis-core-59.0.1.jar) Unloaded->Constructed
	AdvancedRepulsionSystems{59.0.1} [Advanced Repulsion Systems] (adv-repulsion-systems-59.0.1.jar) Unloaded->Constructed
	AdvancedMachines{59.0.1} [Advanced Machines] (advanced-machines-59.0.1.jar) Unloaded->Constructed
	AnimationAPI{1.2.2} [AnimationAPI] (AnimationAPI-1.7.2-1.2.2.jar) Unloaded->Constructed
	BuildCraft|Core{6.0.17} [BuildCraft] (buildcraft-6.0.17.jar) Unloaded->Constructed
	CoFHCore{1.7.10R3.0.0B5} [CoFH Core] (CoFHCore-[1.7.10]3.0.0B5-30.jar) Unloaded->Constructed
	ThermalFoundation{1.7.10R1.0.0B3} [Thermal Foundation] (ThermalFoundation-[1.7.10]1.0.0B3-8.jar) Unloaded->Constructed
	ForgeMultipart{1.1.0.297} [Forge Multipart] (ForgeMultipart-1.7.10-1.1.0.297-universal.jar) Unloaded->Constructed
	ExtraUtilities{1.1.0i} [Extra Utilities] (extrautilities-1.1.0i.jar) Unloaded->Constructed
	MetallurgyCore{4.0.3} [Metallurgy Core] (MetallurgyCore-1.7.10-4.0.3.11.jar) Unloaded->Constructed
	BuildCraft|Builders{6.0.17} [BC Builders] (buildcraft-6.0.17.jar) Unloaded->Constructed
	BuildCraft|Energy{6.0.17} [BC Energy] (buildcraft-6.0.17.jar) Unloaded->Constructed
	BuildCraft|Factory{6.0.17} [BC Factory] (buildcraft-6.0.17.jar) Unloaded->Constructed
	Railcraft{9.2.2.0} [Railcraft] (Railcraft_1.7.10-9.2.2.0.jar) Unloaded->Constructed
	GalacticraftCore{3.0.1} [Galacticraft Core] (GalacticraftCore-BETA-1.7-3.0.1.170.jar) Unloaded->Constructed
	Mekanism{7.1.0} [Mekanism] (Mekanism-1.7.10-7.1.0.91.jar) Unloaded->Constructed
	ThermalExpansion{1.7.10R4.0.0B5} [Thermal Expansion] (ThermalExpansion-[1.7.10]4.0.0B5-13.jar) Unloaded->Constructed
	appliedenergistics2{rv0-stable-10} [Applied Energistics 2] (appliedenergistics2-rv0-stable-10.jar) Unloaded->Constructed
	BiblioCraft{1.7.5} [BiblioCraft] (BiblioCraft[v1.7.5][MC1.7.10].jar) Unloaded->Constructed
	Mantle{1.7.10-165.4bc3343} [Mantle] (Mantle_mc1.7.10_0.3.0 (1).jar) Unloaded->Constructed
	Natura{2.2.0} [Natura] (natura-1.7.10-2.2.0-b1.jar) Unloaded->Constructed
	BiomesOPlenty{2.1.0} [Biomes O' Plenty] (BiomesOPlenty-1.7.10-2.1.0.977-universal.jar) Unloaded->Constructed
	BiblioWoodsBoP{1.7} [BiblioWoods Biomes O'Plenty Edition] (BiblioWoods[BiomesOPlenty][v1.7].jar) Unloaded->Constructed
	BiblioWoodsNatura{1.3} [BiblioWoods Natura Edition] (BiblioWoods[Natura][v1.3].jar) Unloaded->Constructed
	blocklings{1.2.0} [Blocklings] (Blocklings-v1.2.0-MC1.7.10.jar) Unloaded->Constructed
	BuildCraft|Transport{6.0.17} [BC Transport] (buildcraft-6.0.17.jar) Unloaded->Constructed
	BuildCraft|Silicon{6.0.17} [BC Silicon] (buildcraft-6.0.17.jar) Unloaded->Constructed
	easycoloredlights{1.7.2.} [Easy Colored Lights] (ColoredLightsCore-1.7.10.01.jar) Unloaded->Constructed
	DimensionalAnchors{59.0.2} [Dimensional Anchors] (dimensional-anchor-59.0.2.jar) Unloaded->Constructed
	Enchiridion{1.1} [Enchiridion] (Enchiridion-1.7.X-1.2b.jar) Unloaded->Constructed
	Waila{1.5.3a} [Waila] (Waila-1.5.3a_1.7.10.jar) Unloaded->Constructed
	TConstruct{1.7.10-1.6.0.build591} [Tinkers' Construct] (TConstruct_mc1.7.10_1.6.0d39 (1).jar) Unloaded->Constructed
	Metallurgy{4.0.4} [Metallurgy 4] (Metallurgy-1.7.10-4.0.4.43.jar) Unloaded->Constructed
	ExtraTiC{0.8.4} [ExtraTiC] (ExtraTiC-1.7.10-1.0.3.jar) Unloaded->Constructed
	GalacticraftMars{3.0.1} [Galacticraft Planets] (Galacticraft-Planets-BETA-1.7-3.0.1.170.jar) Unloaded->Constructed
	IronChest{6.0.51.734} [Iron Chest] (ironchest-1.7.10-6.0.51.734-universal.jar) Unloaded->Constructed
	journeymap{4.0.4} [JourneyMap] (JourneyMap4.0.4_Unlimited_MC1.7.10.jar) Unloaded->Constructed
	LiquidXP{59.0.0} [Liquid XP] (liquid-xp-59.0.0.jar) Unloaded->Constructed
	magicalcrops{1.7.2 - 0.1 ALPHA} [Magical Crops] (magicalcrops-1.7.10_0.1.jar) Unloaded->Constructed
	Mariculture{1.2.3b} [Mariculture] (Mariculture-1.7.10-1.2.3b.jar) Unloaded->Constructed
	MekanismGenerators{7.1.0} [MekanismGenerators] (MekanismGenerators-1.7.10-7.1.0.91.jar) Unloaded->Constructed
	MekanismTools{7.1.0} [MekanismTools] (MekanismTools-1.7.10-7.1.0.91.jar) Unloaded->Constructed
	meteors{2.13.1} [Falling Meteors] (meteors-1.7.10-2.13.1.jar) Unloaded->Constructed
	AencEx{0.0.1} [AencEx] (MoreEnchantments-1.7.X-1.1.jar) Unloaded->Constructed
	me{1.1} [More Enchantments] (MoreEnchantments-1.7.X-1.1.jar) Unloaded->Constructed
	MutantCreatures{1.4.5} [Mutant Creatures] (MutantCreatures-1.7.2-1.4.5.jar) Unloaded->Constructed
	NEIAddons{1.12.2.9} [NEI Addons] (neiaddons-mc1710-1.12.2.9.jar) Unloaded->Constructed
	NEIAddons|Botany{1.12.2.9} [NEI Addons: Botany] (neiaddons-mc1710-1.12.2.9.jar) Unloaded->Constructed
	NEIAddons|Forestry{1.12.2.9} [NEI Addons: Forestry] (neiaddons-mc1710-1.12.2.9.jar) Unloaded->Constructed
	NEIAddons|CraftingTables{1.12.2.9} [NEI Addons: Crafting Tables] (neiaddons-mc1710-1.12.2.9.jar) Unloaded->Constructed
	NEIAddons|ExNihilo{1.12.2.9} [NEI Addons: Ex Nihilo] (neiaddons-mc1710-1.12.2.9.jar) Unloaded->Constructed
	NetherOres{1.7.10R2.3.0RC3} [Nether Ores] (NetherOres-[1.7.10]2.3.0RC3-84.jar) Unloaded->Constructed
	ProjRed|Core{4.4.5.44} [ProjectRed] (ProjectRed-Base-1.7.10-4.4.5.44.jar) Unloaded->Constructed
	ProjRed|Transmission{4.4.5.44} [ProjectRed-Transmission] (ProjectRed-Integration-1.7.10-4.4.5.44.jar) Unloaded->Constructed
	ProjRed|Transportation{4.4.5.44} [ProjectRed-Transportation] (ProjectRed-Mechanical-1.7.10-4.4.5.44.jar) Unloaded->Constructed
	ProjRed|Exploration{4.4.5.44} [ProjectRed-Exploration] (ProjectRed-World-1.7.10-4.4.5.44.jar) Unloaded->Constructed
	ProjRed|Compatibility{4.4.5.44} [ProjectRed-Compatibility] (ProjectRed-Compat-1.7.10-4.4.5.44.jar) Unloaded->Constructed
	ProjRed|Integration{4.4.5.44} [ProjectRed-Integration] (ProjectRed-Integration-1.7.10-4.4.5.44.jar) Unloaded->Constructed
	ProjRed|Illumination{4.4.5.44} [ProjectRed-Illumination] (ProjectRed-Lighting-1.7.10-4.4.5.44.jar) Unloaded->Constructed
	ProjRed|Expansion{4.4.5.44} [ProjectRed-Expansion] (ProjectRed-Mechanical-1.7.10-4.4.5.44.jar) Unloaded->Constructed
	RedstoneArsenal{1.7.10R1.1.0B4} [Redstone Arsenal] (RedstoneArsenal-[1.7.10]1.1.0B4-10.jar) Unloaded->Constructed
	ReiMinimap{1.7.10} [Rei's Minimap] (ReiMinimap-1.7.10-3.6.jar) Unloaded->Constructed
	StevesCarts{2.0.0.b16} [Steve's Carts 2] (StevesCarts2.0.0.b16.jar) Unloaded->Constructed
	telepads{1.6.4 v5} [Teleportation Pads] (Telepads-1.7.2_1.7.jar) Unloaded->Constructed
	TiCTooltips{1.1.9} [TiC Tooltips] (TiC-Tooltips-mc1.7.10-1.1.9.jar) Unloaded->Constructed
	TMechworks{1.7.10-67.34d1d9b} [Tinkers' Mechworks] (TMechworks_mc1.7.10_0.2.8.jar) Unloaded->Constructed
	TorchLevers{1.3.3} [Torch Levers] (TorchLeversV1.3.3.jar) Unloaded
	McMultipart{1.1.0.297} [Minecraft Multipart Plugin] (ForgeMultipart-1.7.10-1.1.0.297-universal.jar) Unloaded
	aobd{2.2.3} [Another One Bites The Dust] (AOBD-2.2.3.jar) Unloaded
	IguanaTweaksTConstruct{1.7.10-2.0.1.DEV.84b0c6f} [Iguana Tweaks for Tinkers Construct] (IguanaTinkerTweaks-1.7.10-2.0.1B2.jar) Unloaded
	ForgeMicroblock{1.1.0.297} [Forge Microblocks] (ForgeMultipart-1.7.10-1.1.0.297-universal.jar) Unloaded
	AE2 Version: stable rv0-stable-10 for Forge 10.13.0.1152
	Mantle Environment: Environment healthy.
	TConstruct Environment: Environment healthy.
	Launched Version: 1.7.10-Forge10.13.0.1208
	LWJGL: 2.9.1
	OpenGL: ATI Radeon HD 4350 GL version 3.3.10765 Compatibility Profile Context, ATI Technologies Inc.
	GL Caps: Using GL 1.3 multitexturing.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Anisotropic filtering is supported and maximum anisotropy is 16.
Shaders are available because OpenGL 2.1 is supported.

	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)
	Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Anisotropic Filtering: Off (1)
Edited by BossX
  • Discord Moderator
Posted
  • Update your Java version.
  • That error commonly occurs when a mod version does not match the version of Forge/MC for the pack or when mods have conflicting APIs. Without more detailed logs and without the API URL it is impossible to say for sure where the issue is originating. You should be building your pack methodically so that when you add a mod and things start crashing you know right where to look.
Posted

Ok, thanks. I'll go through and add a few mods at a time. I recently updated my java version, so I don't think that'll be the issue. I am also using some 1.7.10 modpack as a base, and thenonce I get everything working, I'm gonna pack it up and host it somewhere.

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