Minecraft Forums

Minecraft worked fine last night. I went to sleep, woke up and then this keeps happening. I'm not sure what it is, or how to fix it. It's not just for a single world, but all my worlds are crashing upon loading. Could someone who knows what to look for tell me what the issue is?

---- Minecraft Crash Report ----

WARNING: coremods are present:
Contact their authors BEFORE contacting forge

// Why did you do that?

Time: 4/5/16 2:11 PM
Description: JEI failed to start:

java.lang.NoSuchMethodError: net.minecraft.item.Item.getRegistryName()Ljava/lang/String;
at jeresources.util.MapKeys.getKey(MapKeys.java:19)
at jeresources.entry.WorldGenEntry.addDrops(WorldGenEntry.java:58)
at jeresources.entry.WorldGenEntry.<init>(WorldGenEntry.java:35)
at jeresources.entry.WorldGenEntry.<init>(WorldGenEntry.java:46)
at jeresources.compatibility.minecraft.MinecraftCompat.registerOres(MinecraftCompat.java:65)
at jeresources.compatibility.minecraft.MinecraftCompat.init(MinecraftCompat.java:36)
at jeresources.compatibility.Compatibility.init(Compatibility.java:20)
at jeresources.proxy.CommonProxy.initCompatibility(CommonProxy.java:14)
at jeresources.jei.JEIConfig.register(JEIConfig.java:40)
at mezz.jei.ProxyCommonClient.startJEI(ProxyCommonClient.java:160)
at mezz.jei.ProxyCommonClient.onEntityJoinedWorld(ProxyCommonClient.java:136)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_19_ProxyCommonClient_onEntityJoinedWorld_EntityJoinWorldEvent.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:49)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:140)
at net.minecraft.world.World.func_72838_d(World.java:1111)
at net.minecraft.client.multiplayer.WorldClient.func_72838_d(WorldClient.java:216)
at net.minecraft.client.Minecraft.func_71353_a(Minecraft.java:2438)
at net.minecraft.client.Minecraft.func_71403_a(Minecraft.java:2346)
at net.minecraft.client.network.NetHandlerPlayClient.func_147282_a(NetHandlerPlayClient.java:272)
at net.minecraft.network.play.server.SPacketJoinGame.func_148833_a(SourceFile:76)
at net.minecraft.network.play.server.SPacketJoinGame.func_148833_a(SourceFile:13)
at net.minecraft.network.PacketThreadUtil$1.run(SourceFile:13)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at net.minecraft.util.Util.func_181617_a(SourceFile:45)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1041)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:366)
at net.minecraft.client.main.Main.main(SourceFile:124)
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: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:
---------------------------------------------------------------------------------------

-- System Details --
Details:
Minecraft Version: 1.9
Operating System: Windows 8.1 (amd64) version 6.3
Java Version: 1.8.0_66, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 2158629448 bytes (2058 MB) / 3101687808 bytes (2958 MB) up to 4772593664 bytes (4551 MB)
JVM Flags: 3 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xms2G -Xmx5G
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP 9.23 Powered by Forge 12.16.0.1833 Optifine OptiFine_1.9_HD_U_B1 14 mods loaded, 14 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCHIJAAAA mcp{9.19} [Minecraft Coder Pack] (minecraft.jar)
UCHIJAAAA FML{8.0.99.99} [Forge Mod Loader] (forge-1.9-12.16.0.1833-1.9.jar)
UCHIJAAAA Forge{12.16.0.1833} [Minecraft Forge] (forge-1.9-12.16.0.1833-1.9.jar)
UCHIJAAAA betterbuilderswands{0.5.3} [Better Builder's Wands] (BetterBuildersWands-0.5.3-1.9r102+137c734.jar)
UCHIJAAAA capsule{1.0.3} [Capsule] (capsule-1.9-1.1.3.jar)
UCHIJAAAA Chameleon{1.9-2.1.2} [Chameleon] (Chameleon-1.9-2.1.2.jar)
UCHIJAAAA JEI{3.2.4.177} [Just Enough Items] (jei_1.9-3.2.4.177.jar)
UCHIJAAAA jeresources{0.4.1} [Just Enough Resources] (JustEnoughResources-1.9-0.4.1 (1).jar)
UCHIJAAAA progressiveautomation{1.6.38} [Progressive Automation] (ProgressiveAutomation-1.9-1.6.38.jar)
UCHIJAAAA sentek{1.1} [Sentek Runic Teleporters] (Sentek-1.1.jar)
UCHIJAAAA StorageDrawers{1.9-3.1.3} [Storage Drawers] (StorageDrawers-1.9-3.1.3.jar)
UCHIJAAAA terrariabuttons{1.0.1} [Terraria Buttons] (TerrariaButtons-1.9-1.0.1.jar)
UCHIJAAAA usefulrecipes{1.2} [UsefulRecipes] (UsefulRecipes-1.2.jar)
UCHIJAAAA XaeroMinimap{1.8.5.3} [Xaero's Minimap] (Xaeros_Minimap_1.8.5.3_Forge_1.9.jar)
Loaded coremods (and transformers):
OptiFine Version: OptiFine_1.9_HD_U_B1
Render Distance Chunks: 7
Mipmaps: 4
Anisotropic Filtering: 1
Antialiasing: 0
Multitexture: false
Shaders: null
OpenGlVersion: 4.2.12422 Compatibility Profile Context 13.152.0.0
OpenGlRenderer: AMD Radeon HD 8400
OpenGlVendor: ATI Technologies Inc.
CpuCount: 4