Minecraft Forums

So I've really wanted to play Greg Tech but whenever I start up my minecraft it states that Gretech and the gregtech api is error ed and crashed my minecraft. Do you think that it is because of the other mods in the folder or the versions? Here's the crash report.

---- Minecraft Crash Report ----
// Don't be sad. I'll do better next time, I promise!

Time: 8/28/15 6:39 PM
Description: Exception in server tick loop

cpw.mods.fml.common.LoaderException: java.lang.NoClassDefFoundError: gregapi/item/MultiItemTool
at cpw.mods.fml.common.LoadController.transition(LoadController.java:163)
at cpw.mods.fml.common.Loader.preinitializeMods(Loader.java:559)
at cpw.mods.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:88)
at cpw.mods.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:314)
at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:117)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:387)
at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)
Caused by: java.lang.NoClassDefFoundError: gregapi/item/MultiItemTool
at gregapi.GT_API.onPreLoad(GT_API.java:325)
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 cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:532)
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:212)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:190)
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:119)
at cpw.mods.fml.common.Loader.preinitializeMods(Loader.java:556)
... 5 more
Caused by: java.lang.ClassNotFoundException: gregapi.item.MultiItemTool
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 32 more
Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: forestry.api.arboriculture.IToolGrafter
at com.google.common.base.Throwables.propagate(Throwables.java:160)
at weatherpony.partial.asmedit.ExtentionListenerTransformer.transform(ExtentionListenerTransformer.java:48)
at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279)
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176)
... 34 more
Caused by: java.lang.ClassNotFoundException: forestry.api.arboriculture.IToolGrafter
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at weatherpony.partial.asmedit.ExtentionListenerTransformer.transform(ExtentionListenerTransformer.java:44)
... 36 more
Caused by: java.lang.NullPointerException
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)
... 41 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 7 (amd64) version 6.1
Java Version: 1.8.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 1603831112 bytes (1529 MB) / 2063597568 bytes (1968 MB) up to 2063597568 bytes (1968 MB)
JVM Flags: 2 total; -Xmx2048M -Xms2048M
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 10.13.4.1492 27 mods loaded, 27 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-1.7.10-10.13.4.1492-1.7.10-universal.jar)
UCH Forge{10.13.4.1492} [Minecraft Forge] (forge-1.7.10-10.13.4.1492-1.7.10-universal.jar)
UCH Micdoodlecore{} [Micdoodle8 Core] (minecraft.jar)
UCH seasonsmod{pre-3.0beta4} [The Seasons Mod] (1.7.10-TheSeasonsMod-pre-3.0beta4 (2).pmlm)
UCH seasonsmodac{1.0} [Additional Seasons Content] (1.7.10-TheSeasonsMod-pre-3.0beta4 (2).pmlm)
UCH wputil{1.4} [WeatherPony Utilities] (1.7.10-TheSeasonsMod-pre-3.0beta4 (2).pmlm)
UCH doggytalents{v1.9.0h} [Doggy Talents] (DoggyTalents-1.7.10-v1.9.0h-universal.jar)
UCE gregapi{GT6-MC1710} [Greg-API] (gregtech_1.7.10-6.00.50(1).jar)
UCH IC2{2.2.761-experimental} [IndustrialCraft 2] (industrialcraft-2-2.2.761-experimental.jar)
UCH GalacticraftCore{3.0.12} [Galacticraft Core] (GalacticraftCore-1.7-3.0.12.350.jar)
UCH GalacticraftMars{3.0.12} [Galacticraft Planets] (Galacticraft-Planets-1.7-3.0.12.350.jar)
UCE gregtech{GT6-MC1710} [GregTech] (gregtech_1.7.10-6.00.50(1).jar)
UCH HardcoreDarkness{1.6} [Hardcore Darkness] (HardcoreDarkness-MC1.7.10-1.6.jar)
UCH lycanitesmobs{1.11.0.5 - MC 1.7.10} [Lycanites Mobs] (LycanitesMobsComplete 1.11.0.5 [1.7.10].jar)
UCH arcticmobs{1.11.0.5 - MC 1.7.10} [Lycanites Arctic Mobs] (LycanitesMobsComplete 1.11.0.5 [1.7.10].jar)
UCH demonmobs{1.11.0.5 - MC 1.7.10} [Lycanites Demon Mobs] (LycanitesMobsComplete 1.11.0.5 [1.7.10].jar)
UCH desertmobs{1.11.0.5 - MC 1.7.10} [Lycanites Desert Mobs] (LycanitesMobsComplete 1.11.0.5 [1.7.10].jar)
UCH forestmobs{1.11.0.5 - MC 1.7.10} [Lycanites Forest Mobs] (LycanitesMobsComplete 1.11.0.5 [1.7.10].jar)
UCH freshwatermobs{1.11.0.5 - MC 1.7.10} [Lycanites Freshwater Mobs] (LycanitesMobsComplete 1.11.0.5 [1.7.10].jar)
UCH infernomobs{1.11.0.5 - MC 1.7.10} [Lycanites Inferno Mobs] (LycanitesMobsComplete 1.11.0.5 [1.7.10].jar)
UCH junglemobs{1.11.0.5 - MC 1.7.10} [Lycanites Jungle Mobs] (LycanitesMobsComplete 1.11.0.5 [1.7.10].jar)
UCH mountainmobs{1.11.0.5 - MC 1.7.10} [Lycanites Mountain Mobs] (LycanitesMobsComplete 1.11.0.5 [1.7.10].jar)
UCH plainsmobs{1.11.0.5 - MC 1.7.10} [Lycanites Plains Mobs] (LycanitesMobsComplete 1.11.0.5 [1.7.10].jar)
UCH saltwatermobs{1.11.0.5 - MC 1.7.10} [Lycanites Saltwater Mobs] (LycanitesMobsComplete 1.11.0.5 [1.7.10].jar)
UCH shadowmobs{1.11.0.5 - MC 1.7.10} [Lycanites Shadow Mobs] (LycanitesMobsComplete 1.11.0.5 [1.7.10].jar)
UCH swampmobs{1.11.0.5 - MC 1.7.10} [Lycanites Swamp Mobs] (LycanitesMobsComplete 1.11.0.5 [1.7.10].jar)
Profiler Position: N/A (disabled)
Is Modded: Definitely; Server brand changed to 'fml,forge'
Type: Dedicated Server (map_server.txt)

Thanks for the input but I believe once Greg Tech start to initialize then it create the api. I did some testing and found that the seasons mod kept giving Greg Tech and error. Can you add more information on this?