My mod works fine on the client side but when I try and load the server I get an error that I can't figure out.  I'm new to modding.  Any help would be appreciated. 

 

Error:

Spoiler

---- Minecraft Crash Report ----
// Daisy, daisy...

Time: 5/16/17 11:57 PM
Description: Exception in server tick loop

net.minecraftforge.fml.common.LoaderExceptionModCrash: Caught exception from vin0m's Mod (vmod)
Caused by: net.minecraftforge.fml.common.LoaderException: java.lang.InstantiationException: net.vinom.vmod.proxy.CommonProxy
    at net.minecraftforge.fml.common.ProxyInjector.inject(ProxyInjector.java:102)
    at net.minecraftforge.fml.common.FMLModContainer.constructMod(FMLModContainer.java:620)
    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 net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:246)
    at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:224)
    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 net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:147)
    at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:563)
    at net.minecraftforge.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:99)
    at net.minecraftforge.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:331)
    at net.minecraft.server.dedicated.DedicatedServer.init(DedicatedServer.java:124)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:508)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.InstantiationException: net.vinom.vmod.proxy.CommonProxy
    at java.lang.Class.newInstance(Unknown Source)
    at net.minecraftforge.fml.common.ProxyInjector.inject(ProxyInjector.java:85)
    ... 28 more
Caused by: java.lang.NoSuchMethodException: net.vinom.vmod.proxy.CommonProxy.<init>()
    at java.lang.Class.getConstructor0(Unknown Source)
    ... 30 more

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

-- System Details --
Details:
    Minecraft Version: 1.11.2
    Operating System: Windows 10 (amd64) version 10.0
    Java Version: 1.8.0_111, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 1924631368 bytes (1835 MB) / 2120744960 bytes (2022 MB) up to 7615283200 bytes (7262 MB)
    JVM Flags: 0 total; 
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: MCP 9.38 Powered by Forge 13.20.0.2228 5 mods loaded, 5 mods active
    States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
    UC    minecraft{1.11.2} [Minecraft] (minecraft.jar) 
    UC    mcp{9.19} [Minecraft Coder Pack] (minecraft.jar) 
    UC    FML{8.0.99.99} [Forge Mod Loader] (forgeSrc-1.11.2-13.20.0.2228.jar) 
    UC    forge{13.20.0.2228} [Minecraft Forge] (forgeSrc-1.11.2-13.20.0.2228.jar) 
    UE    vmod{5.0} [vin0m's Mod] (bin) 
    Loaded coremods (and transformers): 
    Profiler Position: N/A (disabled)
    Is Modded: Definitely; Server brand changed to 'fml,forge'
    Type: Dedicated Server (map_server.txt)

 

Main java file:

Spoiler

package net.vinom.vmod;

import net.minecraft.creativetab.CreativeTabs;
import net.minecraftforge.fml.common.Mod;
import net.minecraftforge.fml.common.SidedProxy;
import net.minecraftforge.fml.common.Mod.EventHandler;
import net.minecraftforge.fml.common.event.FMLInitializationEvent;
import net.minecraftforge.fml.common.event.FMLPostInitializationEvent;
import net.minecraftforge.fml.common.event.FMLPreInitializationEvent;
import net.vinom.vmod.init.ModBlocks;
import net.vinom.vmod.init.ModItems;
import net.vinom.vmod.proxy.CommonProxy;

@Mod(modid = Reference.MODID, name = Reference.NAME, version = Reference.VERSION, acceptedMinecraftVersions = "[1.11.2]")
public class vmod {
    
    @Mod.Instance(Reference.MODID)
    public static vmod instance;
    
    @SidedProxy(serverSide = Reference.SERVER_PROXY_CLASS, clientSide = Reference.CLIENT_PROXY_CLASS)
    public static CommonProxy proxy;
    
    public static final CreativeTabs CREATIVE_TAB = new CreativeTab();
    
    @EventHandler
    public void preInit(FMLPreInitializationEvent event){
        System.out.println("Pre Init");
        ModItems.init();
        ModItems.register();
        
        ModBlocks.init();
        ModBlocks.register();
        
        
    }
    
    @EventHandler
    public void init(FMLInitializationEvent event){
        System.out.println("Init");
        proxy.init();
    }
    
    @EventHandler
    public void postInit(FMLPostInitializationEvent event){
        System.out.println("Post Init");
    }

}

 

Common Proxy:

Spoiler

package net.vinom.vmod.proxy;

public interface CommonProxy {
    
    public void init();

}

 

Client Proxy:

Spoiler

package net.vinom.vmod.proxy;

import net.vinom.vmod.init.ModBlocks;
import net.vinom.vmod.init.ModItems;

public class ClientProxy implements CommonProxy {

    @Override
    public void init() {
        ModItems.registerRenders();
        ModBlocks.registerRenders();
    }

}

 

Your common proxy is... an interface? Why? The way proxies work is you have 2 classes - a common(server) and client. If the game is loaded as a client(normal executable/jar) it will use an instance of your client proxy class. Otherwise it will use an instance of your common proxy class. Right now your common proxy is an interface, which can't be instantiated, obviously. The reason common proxy is named common and not server is because usually people put common(both server and client) things there and call super() in their client proxy, so the code in the common proxy is fired on both sides.

Make your common proxy a normal class, change your client proxy to extend it instead of implemeting it and it should work.

Yes, you can tecnically still have a common interface, I think. But then the serverSide must point to a normal instantiable class too.

In other words, your common proxy may implement an interface, but it should not itself be an interface. It needs to be a (non-abstract) class.

Thanks everyone!  That did the trick.