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---- Minecraft Crash Report ----
// I let you down. Sorry

Time: 4/26/16 7:18 PM
Description: There was a severe problem during mod loading that has caused the game to fail

cpw.mods.fml.common.LoaderException: java.lang.NoClassDefFoundError: pneumaticCraft/common/thirdparty/buildcraft/TileEntityPneumaticEngine
at cpw.mods.fml.common.LoadController.transition(LoadController.java:163)
at cpw.mods.fml.common.Loader.preinitializeMods(Loader.java:559)
at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:243)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:480)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:878)
at net.minecraft.client.main.Main.main(SourceFile:148)
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:483)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.NoClassDefFoundError: pneumaticCraft/common/thirdparty/buildcraft/TileEntityPneumaticEngine
at pneumaticCraft.common.thirdparty.buildcraft.BuildCraft.preInit(BuildCraft.java:32)
at pneumaticCraft.common.thirdparty.ThirdPartyManager.preInit(ThirdPartyManager.java:89)
at pneumaticCraft.PneumaticCraft.PreInit(PneumaticCraft.java:80)
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:483)
at cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:532)
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
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:212)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:190)
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:483)
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:119)
at cpw.mods.fml.common.Loader.preinitializeMods(Loader.java:556)
... 10 more
Caused by: java.lang.ClassNotFoundException: pneumaticCraft.common.thirdparty.buildcraft.TileEntityPneumaticEngine
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 39 more
Caused by: java.lang.NoClassDefFoundError: buildcraft/api/power/IPowerReceptor
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)
... 41 more
Caused by: java.lang.ClassNotFoundException: buildcraft.api.power.IPowerReceptor
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:101)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 45 more

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

-- System Details --
Details:
Minecraft Version: 1.7.10
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 152047400 bytes (145 MB) / 467726336 bytes (446 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
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 v7.10.99.99 Minecraft Forge 10.13.4.1614 33 mods loaded, 33 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCH mcp{9.05} [Minecraft Coder Pack] (minecraft.jar)
UCH FML{7.10.99.99} [Forge Mod Loader] (forge-1.7.10-10.13.4.1614-1.7.10.jar)
UCH Forge{10.13.4.1614} [Minecraft Forge] (forge-1.7.10-10.13.4.1614-1.7.10.jar)
UCH CodeChickenCore{1.0.7.46} [CodeChicken Core] (minecraft.jar)
UCH NotEnoughItems{1.0.5.110} [Not Enough Items] (NotEnoughItems-1.7.10-1.0.5.110-universal.jar)
UCH <CoFH ASM>{000} [CoFH ASM] (minecraft.jar)
UCH BiblioCraft{1.11.2} [BiblioCraft] (BiblioCraft[v1.11.2][MC1.7.10].jar)
UCH CoFHCore{1.7.10R3.1.2} [CoFH Core] (CoFHCore-[1.7.10]3.1.2-325.jar)
UCH ThermalFoundation{1.7.10R1.2.3} [Thermal Foundation] (ThermalFoundation-[1.7.10]1.2.3-112.jar)
UCH ThermalExpansion{1.7.10R4.1.2} [Thermal Expansion] (ThermalExpansion-[1.7.10]4.1.2-240.jar)
UCH BigReactors{0.4.3A} [Big Reactors] (BigReactors-0.4.3A.jar)
UCH BuildCraft|Core{7.1.16} [BuildCraft] (buildcraft-7.1.16.jar)
UCH BuildCraft|Builders{7.1.16} [BC Builders] (buildcraft-7.1.16.jar)
UCH BuildCraft|Transport{7.1.16} [BC Transport] (buildcraft-7.1.16.jar)
UCH BuildCraft|Energy{7.1.16} [BC Energy] (buildcraft-7.1.16.jar)
UCH BuildCraft|Silicon{7.1.16} [BC Silicon] (buildcraft-7.1.16.jar)
UCH BuildCraft|Robotics{7.1.16} [BC Robotics] (buildcraft-7.1.16.jar)
UCH BuildCraft|Factory{7.1.16} [BC Factory] (buildcraft-7.1.16.jar)
UCH EnderIO{1.7.10-2.2.8.381} [Ender IO] (EnderIO-1.7.10-2.2.8.381.jar)
UCH flansmod{4.8.0} [Flan's Mod] (Flans Mod-1.7.10-4.8.0.jar)
UCH helpfulvillagers{1.2.4} [Helpful Villagers] (helpfulvillagers-1.7.10-1.2.4.jar)
UCH IC2{2.2.821-experimental} [IndustrialCraft 2] (Industrial-Craft-2-Mod-Experimental-1.7.10.jar)
UCH IronChest{6.0.62.742} [Iron Chest] (ironchest-1.7.10-6.0.62.742-universal.jar)
UCH journeymap{5.1.4} [JourneyMap] (journeymap-1.7.10-5.1.4-unlimited.jar)
UCH Mantle{1.7.10-0.3.2.jenkins184} [Mantle] (Mantle-1.7.10-0.3.2.jar)
UCH mfs{3.0.0} [Minecraft Flight Simulator] (Minecraft Flight Simulator-1.7.10-3.0.0.jar)
UCH Natura{2.2.0} [Natura] (natura-1.7.10-2.2.0.1.jar)
UCE PneumaticCraft{1.2.6} [PneumaticCraft] (PneumaticCraft-1.2.6.jar)
UCH Railcraft{9.6.1.0} [Railcraft] (Railcraft_1.7.10-9.6.1.0.jar)
UCH simplyjetpacks{1.3.2} [Simply Jetpacks] (SimplyJetpacks-MC1.7.10-1.3.2.jar)
UCH simply_sit{1.7.10-1.1.0} [Simply Sit] (SimplySit-1.7.10-1.1.0.jar)
UCH TConstruct{1.7.10-1.8.8.build988} [Tinkers' Construct] (TConstruct-1.7.10-1.8.8.jar)
UCH bspkrsCore{6.15} [bspkrsCore] ([1.7.10]bspkrsCore-universal-6.15.jar)
GL info: ' Vendor: 'Intel' Version: '3.1.0 - Build 9.17.10.4229' Renderer: 'Intel(R) HD Graphics 2000'
CoFHCore: -[1.7.10]3.1.2-325
ThermalFoundation: -[1.7.10]1.2.3-112
ThermalExpansion: -[1.7.10]4.1.2-240
Mantle Environment: Environment healthy.
TConstruct Environment: Environment healthy.

o.o so delete pneumatic craft? and get a newer version Buildcraft?

No, don't delete Pneumaticraft. Just update it

ummmm pneumatic craft doesnt have an update. I checked