Minecraft Forums

I need someone to help me with my forge, ive just installed forge and I wanted to put optifineon it, so when I put the mod in after I opened up the launcher an everything the game wont start, but if I take the optifine mod out and put in the others, optifine works fine. And these are the logs I think from when I tried forge with optifine

[07:29:54] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[07:29:55] [main/INFO] [LaunchWrapper]: Using primary tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[07:29:55] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLTweaker
[07:29:55] [main/INFO] [FML]: Forge Mod Loader version 8.99.124.1450 for Minecraft 1.8 loading
[07:29:55] [main/INFO] [FML]: Java is Java HotSpot(TM) 64-Bit Server VM, version 1.7.0_80, running on Windows 8.1:amd64:6.3, installed at C:\Program Files\Java\jre7
[07:29:55] [main/INFO] [FML]: Loading tweaker optifine.OptiFineForgeTweaker from OptiFine_1.8.7_HD_U_D6.jar
[07:29:55] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[07:29:55] [main/INFO] [LaunchWrapper]: Loading tweak class name optifine.OptiFineForgeTweaker
[07:29:55] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
[07:29:55] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[07:29:55] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[07:29:55] [main/INFO] [LaunchWrapper]: Calling tweak class optifine.OptiFineForgeTweaker
[07:29:55] [main/INFO] [STDOUT]: [optifine.OptiFineForgeTweaker:dbg:49]: OptiFineForgeTweaker: acceptOptions
[07:29:55] [main/INFO] [STDOUT]: [optifine.OptiFineForgeTweaker:dbg:49]: OptiFineForgeTweaker: injectIntoClassLoader
[07:29:55] [main/INFO] [STDOUT]: [optifine.OptiFineClassTransformer:dbg:179]: OptiFine ClassTransformer
[07:29:55] [main/INFO] [STDOUT]: [optifine.OptiFineClassTransformer:dbg:179]: OptiFine URL: file:/C:/Users/MarQuis/AppData/Roaming/.minecraft/mods/OptiFine_1.8.7_HD_U_D6.jar
[07:29:55] [main/INFO] [STDOUT]: [optifine.OptiFineClassTransformer:dbg:179]: OptiFine ZIP file: [email protected]
[07:29:55] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[07:30:00] [main/WARN] [FML]: Patcher expecting empty class data file for net.minecraft.server.dedicated.DedicatedServer$4, but received non-empty
[07:30:01] [main/INFO] [FML]: Found valid fingerprint for Minecraft Forge. Certificate fingerprint e3c3d50c7c986df74c645c0ac54639741c90a557
[07:30:01] [main/INFO] [FML]: Found valid fingerprint for Minecraft. Certificate fingerprint cd99959656f753dc28d863b46769f7f8fbaefcfc
[07:30:01] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[07:30:01] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
[07:30:04] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.TerminalTweaker
[07:30:04] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.TerminalTweaker
[07:30:04] [main/INFO] [STDOUT]: [optifine.OptiFineForgeTweaker:dbg:49]: OptiFineForgeTweaker: getLaunchArguments
[07:30:04] [main/INFO] [LaunchWrapper]: Launching wrapped minecraft {net.minecraft.client.main.Main}
[07:30:08] [Client thread/INFO]: Setting user: vukl
[07:30:09] [Client thread/ERROR] [LaunchWrapper]: Unable to launch
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_80]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_80]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_80]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_80]
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.11.jar:?]
at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.11.jar:?]
Caused by: java.lang.NoClassDefFoundError: net/minecraft/block/state/BlockState$StateImplementation
at net.minecraft.block.state.BlockState.createState(BlockState.java:55) ~[bed.class:?]
at net.minecraft.block.state.BlockState.<init>(BlockState.java:83) ~[bed.class:?]
at net.minecraft.block.state.BlockState.<init>(BlockState.java:50) ~[bed.class:?]
at net.minecraft.block.Block.func_180661_e(Block.java:968) ~[atr.class:?]
at net.minecraft.block.Block.<init>(Block.java:248) ~[atr.class:?]
at net.minecraft.block.BlockAir.<init>(BlockAir.java:15) ~[asy.class:?]
at net.minecraft.block.Block.func_149671_p(Block.java:2016) ~[atr.class:?]
at net.minecraft.init.Bootstrap.func_151354_b(Bootstrap.java:554) ~[od.class:?]
at net.minecraft.client.Minecraft.<init>(Minecraft.java:315) ~[bsu.class:?]
at net.minecraft.client.main.Main.main(SourceFile:120) ~[Main.class:?]
... 6 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.block.state.BlockState$StateImplementation
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.11.jar:?]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at net.minecraft.block.state.BlockState.createState(BlockState.java:55) ~[bed.class:?]
at net.minecraft.block.state.BlockState.<init>(BlockState.java:83) ~[bed.class:?]
at net.minecraft.block.state.BlockState.<init>(BlockState.java:50) ~[bed.class:?]
at net.minecraft.block.Block.func_180661_e(Block.java:968) ~[atr.class:?]
at net.minecraft.block.Block.<init>(Block.java:248) ~[atr.class:?]
at net.minecraft.block.BlockAir.<init>(BlockAir.java:15) ~[asy.class:?]
at net.minecraft.block.Block.func_149671_p(Block.java:2016) ~[atr.class:?]
at net.minecraft.init.Bootstrap.func_151354_b(Bootstrap.java:554) ~[od.class:?]
at net.minecraft.client.Minecraft.<init>(Minecraft.java:315) ~[bsu.class:?]
at net.minecraft.client.main.Main.main(SourceFile:120) ~[Main.class:?]
... 6 more
Caused by: java.lang.NoClassDefFoundError: net/minecraft/block/state/BlockStateBase
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.7.0_80]
at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.7.0_80]
at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.7.0_80]
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182) ~[launchwrapper-1.11.jar:?]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at net.minecraft.block.state.BlockState.createState(BlockState.java:55) ~[bed.class:?]
at net.minecraft.block.state.BlockState.<init>(BlockState.java:83) ~[bed.class:?]
at net.minecraft.block.state.BlockState.<init>(BlockState.java:50) ~[bed.class:?]
at net.minecraft.block.Block.func_180661_e(Block.java:968) ~[atr.class:?]
at net.minecraft.block.Block.<init>(Block.java:248) ~[atr.class:?]
at net.minecraft.block.BlockAir.<init>(BlockAir.java:15) ~[asy.class:?]
at net.minecraft.block.Block.func_149671_p(Block.java:2016) ~[atr.class:?]
at net.minecraft.init.Bootstrap.func_151354_b(Bootstrap.java:554) ~[od.class:?]
at net.minecraft.client.Minecraft.<init>(Minecraft.java:315) ~[bsu.class:?]
at net.minecraft.client.main.Main.main(SourceFile:120) ~[Main.class:?]
... 6 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.block.state.BlockStateBase
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.11.jar:?]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.7.0_80]
at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.7.0_80]
at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.7.0_80]
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182) ~[launchwrapper-1.11.jar:?]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at net.minecraft.block.state.BlockState.createState(BlockState.java:55) ~[bed.class:?]
at net.minecraft.block.state.BlockState.<init>(BlockState.java:83) ~[bed.class:?]
at net.minecraft.block.state.BlockState.<init>(BlockState.java:50) ~[bed.class:?]
at net.minecraft.block.Block.func_180661_e(Block.java:968) ~[atr.class:?]
at net.minecraft.block.Block.<init>(Block.java:248) ~[atr.class:?]
at net.minecraft.block.BlockAir.<init>(BlockAir.java:15) ~[asy.class:?]
at net.minecraft.block.Block.func_149671_p(Block.java:2016) ~[atr.class:?]
at net.minecraft.init.Bootstrap.func_151354_b(Bootstrap.java:554) ~[od.class:?]
at net.minecraft.client.Minecraft.<init>(Minecraft.java:315) ~[bsu.class:?]
at net.minecraft.client.main.Main.main(SourceFile:120) ~[Main.class:?]
... 6 more
Caused by: java.lang.IncompatibleClassChangeError: Implementing class
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.7.0_80]
at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.7.0_80]
at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.7.0_80]
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182) ~[launchwrapper-1.11.jar:?]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.7.0_80]
at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.7.0_80]
at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.7.0_80]
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182) ~[launchwrapper-1.11.jar:?]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at net.minecraft.block.state.BlockState.createState(BlockState.java:55) ~[bed.class:?]
at net.minecraft.block.state.BlockState.<init>(BlockState.java:83) ~[bed.class:?]
at net.minecraft.block.state.BlockState.<init>(BlockState.java:50) ~[bed.class:?]
at net.minecraft.block.Block.func_180661_e(Block.java:968) ~[atr.class:?]
at net.minecraft.block.Block.<init>(Block.java:248) ~[atr.class:?]
at net.minecraft.block.BlockAir.<init>(BlockAir.java:15) ~[asy.class:?]
at net.minecraft.block.Block.func_149671_p(Block.java:2016) ~[atr.class:?]
at net.minecraft.init.Bootstrap.func_151354_b(Bootstrap.java:554) ~[od.class:?]
at net.minecraft.client.Minecraft.<init>(Minecraft.java:315) ~[bsu.class:?]
at net.minecraft.client.main.Main.main(SourceFile:120) ~[Main.class:?]
... 6 more

You need to download the latest version of Optifine, as well as the recommended version of Forge. Then put optifine in ur mods folder.

I do, I have the newest version of everything

Double-Check

On everything I do, I know forge is right cause its works fine with out optifine, but as soon as I add optifine to my mods folders my minecraft wont start and I get error codes, this is wht I get

[22:09:55] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[22:09:55] [main/INFO] [LaunchWrapper]: Using primary tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[22:09:55] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLTweaker
[22:09:55] [main/INFO] [FML]: Forge Mod Loader version 8.99.124.1450 for Minecraft 1.8 loading
[22:09:55] [main/INFO] [FML]: Java is Java HotSpot(TM) 64-Bit Server VM, version 1.7.0_80, running on Windows 8.1:amd64:6.3, installed at C:\Program Files\Java\jre7
[22:09:55] [main/WARN] [FML]: The coremod invtweaks.forge.asm.FMLPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[22:09:55] [main/INFO] [FML]: Loading tweaker optifine.OptiFineForgeTweaker from OptiFine_1.8.7_HD_U_D5.jar
[22:09:55] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[22:09:55] [main/INFO] [LaunchWrapper]: Loading tweak class name optifine.OptiFineForgeTweaker
[22:09:55] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
[22:09:55] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[22:09:55] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[22:09:55] [main/INFO] [LaunchWrapper]: Calling tweak class optifine.OptiFineForgeTweaker
[22:09:55] [main/INFO] [STDOUT]: [optifine.OptiFineForgeTweaker:dbg:49]: OptiFineForgeTweaker: acceptOptions
[22:09:55] [main/INFO] [STDOUT]: [optifine.OptiFineForgeTweaker:dbg:49]: OptiFineForgeTweaker: injectIntoClassLoader
[22:09:56] [main/INFO] [STDOUT]: [optifine.OptiFineClassTransformer:dbg:179]: OptiFine ClassTransformer
[22:09:56] [main/INFO] [STDOUT]: [optifine.OptiFineClassTransformer:dbg:179]: OptiFine URL: file:/C:/Users/MarQuis/AppData/Roaming/.minecraft/mods/OptiFine_1.8.7_HD_U_D5.jar
[22:09:56] [main/INFO] [STDOUT]: [optifine.OptiFineClassTransformer:dbg:179]: OptiFine ZIP file: [email protected]
[22:09:56] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[22:10:01] [main/WARN] [FML]: Patcher expecting empty class data file for net.minecraft.server.dedicated.DedicatedServer$4, but received non-empty
[22:10:02] [main/INFO] [FML]: Found valid fingerprint for Minecraft Forge. Certificate fingerprint e3c3d50c7c986df74c645c0ac54639741c90a557
[22:10:02] [main/INFO] [FML]: Found valid fingerprint for Minecraft. Certificate fingerprint cd99959656f753dc28d863b46769f7f8fbaefcfc
[22:10:02] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[22:10:02] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[22:10:02] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
[22:10:05] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.TerminalTweaker
[22:10:05] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.TerminalTweaker
[22:10:05] [main/INFO] [STDOUT]: [optifine.OptiFineForgeTweaker:dbg:49]: OptiFineForgeTweaker: getLaunchArguments
[22:10:05] [main/INFO] [LaunchWrapper]: Launching wrapped minecraft {net.minecraft.client.main.Main}
[22:10:09] [Client thread/INFO]: Setting user: TheKing321
[22:10:11] [Client thread/ERROR] [LaunchWrapper]: Unable to launch
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_80]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_80]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_80]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_80]
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.11.jar:?]
at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.11.jar:?]
Caused by: java.lang.NoClassDefFoundError: net/minecraft/block/state/BlockState$StateImplementation
at net.minecraft.block.state.BlockState.createState(BlockState.java:55) ~[bed.class:?]
at net.minecraft.block.state.BlockState.<init>(BlockState.java:83) ~[bed.class:?]
at net.minecraft.block.state.BlockState.<init>(BlockState.java:50) ~[bed.class:?]
at net.minecraft.block.Block.func_180661_e(Block.java:968) ~[atr.class:?]
at net.minecraft.block.Block.<init>(Block.java:248) ~[atr.class:?]
at net.minecraft.block.BlockAir.<init>(BlockAir.java:15) ~[asy.class:?]
at net.minecraft.block.Block.func_149671_p(Block.java:2016) ~[atr.class:?]
at net.minecraft.init.Bootstrap.func_151354_b(Bootstrap.java:554) ~[od.class:?]
at net.minecraft.client.Minecraft.<init>(Minecraft.java:315) ~[bsu.class:?]
at net.minecraft.client.main.Main.main(SourceFile:120) ~[Main.class:?]
... 6 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.block.state.BlockState$StateImplementation
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.11.jar:?]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at net.minecraft.block.state.BlockState.createState(BlockState.java:55) ~[bed.class:?]
at net.minecraft.block.state.BlockState.<init>(BlockState.java:83) ~[bed.class:?]
at net.minecraft.block.state.BlockState.<init>(BlockState.java:50) ~[bed.class:?]
at net.minecraft.block.Block.func_180661_e(Block.java:968) ~[atr.class:?]
at net.minecraft.block.Block.<init>(Block.java:248) ~[atr.class:?]
at net.minecraft.block.BlockAir.<init>(BlockAir.java:15) ~[asy.class:?]
at net.minecraft.block.Block.func_149671_p(Block.java:2016) ~[atr.class:?]
at net.minecraft.init.Bootstrap.func_151354_b(Bootstrap.java:554) ~[od.class:?]
at net.minecraft.client.Minecraft.<init>(Minecraft.java:315) ~[bsu.class:?]
at net.minecraft.client.main.Main.main(SourceFile:120) ~[Main.class:?]
... 6 more
Caused by: java.lang.NoClassDefFoundError: net/minecraft/block/state/BlockStateBase
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.7.0_80]
at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.7.0_80]
at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.7.0_80]
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182) ~[launchwrapper-1.11.jar:?]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at net.minecraft.block.state.BlockState.createState(BlockState.java:55) ~[bed.class:?]
at net.minecraft.block.state.BlockState.<init>(BlockState.java:83) ~[bed.class:?]
at net.minecraft.block.state.BlockState.<init>(BlockState.java:50) ~[bed.class:?]
at net.minecraft.block.Block.func_180661_e(Block.java:968) ~[atr.class:?]
at net.minecraft.block.Block.<init>(Block.java:248) ~[atr.class:?]
at net.minecraft.block.BlockAir.<init>(BlockAir.java:15) ~[asy.class:?]
at net.minecraft.block.Block.func_149671_p(Block.java:2016) ~[atr.class:?]
at net.minecraft.init.Bootstrap.func_151354_b(Bootstrap.java:554) ~[od.class:?]
at net.minecraft.client.Minecraft.<init>(Minecraft.java:315) ~[bsu.class:?]
at net.minecraft.client.main.Main.main(SourceFile:120) ~[Main.class:?]
... 6 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.block.state.BlockStateBase
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.11.jar:?]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.7.0_80]
at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.7.0_80]
at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.7.0_80]
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182) ~[launchwrapper-1.11.jar:?]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at net.minecraft.block.state.BlockState.createState(BlockState.java:55) ~[bed.class:?]
at net.minecraft.block.state.BlockState.<init>(BlockState.java:83) ~[bed.class:?]
at net.minecraft.block.state.BlockState.<init>(BlockState.java:50) ~[bed.class:?]
at net.minecraft.block.Block.func_180661_e(Block.java:968) ~[atr.class:?]
at net.minecraft.block.Block.<init>(Block.java:248) ~[atr.class:?]
at net.minecraft.block.BlockAir.<init>(BlockAir.java:15) ~[asy.class:?]
at net.minecraft.block.Block.func_149671_p(Block.java:2016) ~[atr.class:?]
at net.minecraft.init.Bootstrap.func_151354_b(Bootstrap.java:554) ~[od.class:?]
at net.minecraft.client.Minecraft.<init>(Minecraft.java:315) ~[bsu.class:?]
at net.minecraft.client.main.Main.main(SourceFile:120) ~[Main.class:?]
... 6 more
Caused by: java.lang.IncompatibleClassChangeError: Implementing class
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.7.0_80]
at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.7.0_80]
at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.7.0_80]
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182) ~[launchwrapper-1.11.jar:?]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.7.0_80]
at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.7.0_80]
at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.7.0_80]
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182) ~[launchwrapper-1.11.jar:?]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_80]
at net.minecraft.block.state.BlockState.createState(BlockState.java:55) ~[bed.class:?]
at net.minecraft.block.state.BlockState.<init>(BlockState.java:83) ~[bed.class:?]
at net.minecraft.block.state.BlockState.<init>(BlockState.java:50) ~[bed.class:?]
at net.minecraft.block.Block.func_180661_e(Block.java:968) ~[atr.class:?]
at net.minecraft.block.Block.<init>(Block.java:248) ~[atr.class:?]
at net.minecraft.block.BlockAir.<init>(BlockAir.java:15) ~[asy.class:?]
at net.minecraft.block.Block.func_149671_p(Block.java:2016) ~[atr.class:?]
at net.minecraft.init.Bootstrap.func_151354_b(Bootstrap.java:554) ~[od.class:?]
at net.minecraft.client.Minecraft.<init>(Minecraft.java:315) ~[bsu.class:?]
at net.minecraft.client.main.Main.main(SourceFile:120) ~[Main.class:?]
... 6 more

so problems forge?

oh, but I can get forge 1.8.7 right?

and then all my other mods, like better pvp mods ill have to get the 1.8 version of them

Maybe optifine is incompatible with a mod you are using

Quote from altikat2»

Maybe optifine is incompatible with a mod you are using

Maybe you should read the other posts and the log before posting. He is using optifine 1.8.7 on forge 1.8.

Quote from sazrocks»

Maybe you should read the other posts and the log before posting. He is using optifine 1.8.7 on forge 1.8.

I actually posted this before i knew someone had already answered it. And yes i did read the comments

A certain block state, in your case the bed, is having an ID conflict due to conflicting versio ns. Make sure everything is the exact same version. I recommend downgrading Optifine so that you can avoid having to hunt down a later version of all of your mods.