I get a crash when starting, it says I am naming my object null but I am not, crash log:

 

java.lang.IllegalArgumentException: Illegal object for naming null
at cpw.mods.fml.common.registry.LanguageRegistry.addNameForObject(LanguageRegistry.java:93)
at thedecopack.medieval.blocks.MedievalBlocks.namesEnglish(MedievalBlocks.java:32)
at thedecopack.medieval.blocks.MedievalBlocks.<init>(MedievalBlocks.java:15)
at thedecopack.medieval.DecoMedieval.Init(DecoMedieval.java:37)
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:440)
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.EventHandler.handleEvent(EventHandler.java:69)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
at com.google.common.eventbus.EventBus.post(EventBus.java:268)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:140)
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.EventHandler.handleEvent(EventHandler.java:69)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
at com.google.common.eventbus.EventBus.post(EventBus.java:268)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:83)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:651)
at cpw.mods.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:196)
at net.minecraft.client.Minecraft.startGame(Minecraft.java:465)
at net.minecraft.client.Minecraft.run(Minecraft.java:752)
at java.lang.Thread.run(Unknown Source)
2012-10-31 20:50:21 [iNFO] [sTDERR] java.lang.IllegalArgumentException: Illegal object for naming null
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at cpw.mods.fml.common.registry.LanguageRegistry.addNameForObject(LanguageRegistry.java:93)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at thedecopack.medieval.blocks.MedievalBlocks.namesEnglish(MedievalBlocks.java:32)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at thedecopack.medieval.blocks.MedievalBlocks.<init>(MedievalBlocks.java:15)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at thedecopack.medieval.DecoMedieval.Init(DecoMedieval.java:37)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at java.lang.reflect.Method.invoke(Unknown Source)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:440)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at java.lang.reflect.Method.invoke(Unknown Source)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at com.google.common.eventbus.EventBus.post(EventBus.java:268)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:140)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at java.lang.reflect.Method.invoke(Unknown Source)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at com.google.common.eventbus.EventBus.post(EventBus.java:268)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:83)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at cpw.mods.fml.common.Loader.initializeMods(Loader.java:651)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at cpw.mods.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:196)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at net.minecraft.client.Minecraft.startGame(Minecraft.java:465)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at net.minecraft.client.Minecraft.run(Minecraft.java:752)
2012-10-31 20:50:21 [iNFO] [sTDERR] 	at java.lang.Thread.run(Unknown Source)

 

MedievalBlocks:

package thedecopack.medieval.blocks;

import cpw.mods.fml.common.registry.GameRegistry;
import cpw.mods.fml.common.registry.LanguageRegistry;
import net.minecraft.src.Block;
import net.minecraft.src.BlockWood;

public class MedievalBlocks
{

public static Block redCedarPlanks;

public MedievalBlocks()
{
	this.namesEnglish("en_US");
	this.namesEnglish("en_PT");
	this.namesEnglish("en_GB");
	this.namesEnglish("en_CA");
	this.namesEnglish("en_AU");
	this.namesNorwegian("nb_NO");

	this.redCedarPlanks = (new BlockWoodMedieval(2200, 0)).setHardness(2.0F).setResistance(5.0F).setStepSound(Block.soundWoodFootstep).setBlockName("wood").setRequiresSelfNotify();

	RegisterBlocks(new Block[]
			{
			redCedarPlanks,
			});
}

public void namesEnglish(String lang)
{
	LanguageRegistry.instance().addNameForObject(redCedarPlanks, lang, "Red Cedar Planks");
}

public void namesNorwegian(String lang)
{
	LanguageRegistry.instance().addNameForObject(redCedarPlanks, lang, "Røde Sederplanker");
}

private void RegisterBlocks(Block ablock []) 
{
	Block ablock1[] = ablock;
	int i = ablock1.length;
	for(int j = 0; j < i; j++)
	{
		Block block = ablock1[j];
		GameRegistry.registerBlock(block);
	}	
}
}

Actually nvm i fixed it