Hi, I'm using Forge 1.7.10-10.13.2.1230-universal (as well as minecraft server 1.7.10) and trying to boot a server with an IC2 mod that I got from a list of apparently Forge 1.7.10 compatible mods (http://modlist.mcf.li/version/1.7.10  Mod name is IC2 Classic). I can get my server to boot up if the "mods" folders are empty in both my .minecraft and my server's folder. If I put the IC2 .jar file in the folders, I get a black window for about a second when I start the server and then it closes.

 

Here's what I get as a crash report

 

 

---- Minecraft Crash Report ----

// Sorry

 

Time: 22/10/14 11:20 AM

Description: Exception in server tick loop

 

cpw.mods.fml.common.LoaderException: java.lang.ClassNotFoundException: ic2classic.core.IC2

at cpw.mods.fml.common.LoadController.transition(LoadController.java:162)

at cpw.mods.fml.common.Loader.loadMods(Loader.java:502)

at cpw.mods.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:87)

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.ClassNotFoundException: ic2classic.core.IC2

at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)

at java.lang.ClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at cpw.mods.fml.common.ModClassLoader.loadClass(ModClassLoader.java:58)

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.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.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)

... 5 more

Caused by: java.lang.UnsupportedClassVersionError: ic2classic/core/IC2 : Unsupported major.minor version 51.0

at java.lang.ClassLoader.defineClass1(Native Method)

at java.lang.ClassLoader.defineClassCond(Unknown Source)

at java.lang.ClassLoader.defineClass(Unknown Source)

at java.security.SecureClassLoader.defineClass(Unknown Source)

at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)

... 33 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: 1.6.0_25, Sun Microsystems Inc.

Java VM Version: Java HotSpot 64-Bit Server VM (mixed mode), Sun Microsystems Inc.

Memory: 2976896408 bytes (2838 MB) / 3087007744 bytes (2944 MB) up to 3087007744 bytes (2944 MB)

JVM Flags: 2 total; -Xms3G -Xmx3G

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 v7.10.85.1230 Minecraft Forge 10.13.2.1230 4 mods loaded, 4 mods active

mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed

FML{7.10.85.1230} [Forge Mod Loader] (forge-1.7.10-10.13.2.1230-universal.jar) Unloaded->Constructed

Forge{10.13.2.1230} [Minecraft Forge] (forge-1.7.10-10.13.2.1230-universal.jar) Unloaded->Constructed

IC2-Classic{1.112.170-lf} [industrialCraft 2] (ic2-classic-1.7.10-1.jar) Unloaded->Errored

Profiler Position: N/A (disabled)

Is Modded: Definitely; Server brand changed to 'fml,forge'

Type: Dedicated Server (map_server.txt)

 

 

I get that the problem should be coming from the mod since I can get the server running without it, but I'm comfortable enough to understand what's the problem.

 

Thanks!

hi,

Caused by: java.lang.UnsupportedClassVersionError: ic2classic/core/IC2 : Unsupported major.minor version 51.0

This mod requires Java 7 or newer.

Thanks for the quick answer. I had download the newest java but didn't reboot my computer. Might have been that. Unfortunately, it seems something else is wrong. The same thing happens, but now with this error log:

 

 

---- Minecraft Crash Report ----

// You should try our sister game, Minceraft!

 

Time: 22/10/14 1:27 PM

Description: Exception in server tick loop

 

cpw.mods.fml.common.LoaderException: java.lang.NoSuchMethodError: ic2classic.core.block.BlockRubLeaves.func_150122_b(Z)V

at cpw.mods.fml.common.LoadController.transition(LoadController.java:162)

at cpw.mods.fml.common.Loader.preinitializeMods(Loader.java:515)

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.NoSuchMethodError: ic2classic.core.block.BlockRubLeaves.func_150122_b(Z)V

at ic2classic.core.block.BlockRubLeaves.<init>(BlockRubLeaves.java:34)

at ic2classic.core.IC2.load(IC2.java:455)

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:513)

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.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.preinitializeMods(Loader.java:513)

... 5 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 (x86) version 6.1

Java Version: 1.8.0_25, Oracle Corporation

Java VM Version: Java HotSpot Client VM (mixed mode), Oracle Corporation

Memory: 36879952 bytes (35 MB) / 93999104 bytes (89 MB) up to 259522560 bytes (247 MB)

JVM Flags: 0 total;

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 v7.10.85.1230 Minecraft Forge 10.13.2.1230 4 mods loaded, 4 mods active

mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized

FML{7.10.85.1230} [Forge Mod Loader] (forge-1.7.10-10.13.2.1230-universal.jar) Unloaded->Constructed->Pre-initialized

Forge{10.13.2.1230} [Minecraft Forge] (forge-1.7.10-10.13.2.1230-universal.jar) Unloaded->Constructed->Pre-initialized

IC2-Classic{1.112.170-lf} [industrialCraft 2] (ic2-classic-1.7.10-1.jar) Unloaded->Constructed->Errored

Profiler Position: N/A (disabled)

Is Modded: Definitely; Server brand changed to 'fml,forge'

Type: Dedicated Server (map_server.txt)

 

 

Thanks again for taking the time.

Alright so after many hours of reading and looking around and trying stuff, it seems this "compatible" mod isnt. I found another version that will let the server boot up without any trouble.

 

Now thing is, Forge says the mod is active, but I have no access to any items that mod is supposed to add. I'll keep looking around, maybe there's a different problem with that version too.

Then it's a problem with the mod, contact the mod author.