So I've encountered this problem when I try to add a crafting recipe for item from my mod using other items from my mod minecraft crashes on start up. Eclipse doesn't show any errors and I'm not sure what to do. All my items are in base mod class as well as their crafting recipes. However items that are crafted with vanilla minecraft items work just fine. If you need any part of code just let me know. Thanks in advance

 

-S

You said that i should ask, so here it is: Code?

Here is the error code

---- Minecraft Crash Report ----

// I feel sad now

 

Time: 8/17/13 9:11 PM

Description: Failed to start game

 

java.lang.NullPointerException

        at net.minecraft.item.crafting.CraftingManager.addRecipe(CraftingManager.java:213)

        at cpw.mods.fml.common.registry.GameRegistry.addShapedRecipe(GameRegistry.java:244)

        at cpw.mods.fml.common.registry.GameRegistry.addRecipe(GameRegistry.java:239)

        at mod.tdm.TdmBase.load(TdmBase.java:34)

        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:494)

        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:74)

        at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)

        at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)

        at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)

        at com.google.common.eventbus.EventBus.post(EventBus.java:267)

        at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:192)

        at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:172)

        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:74)

        at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)

        at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)

        at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)

        at com.google.common.eventbus.EventBus.post(EventBus.java:267)

        at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:103)

        at cpw.mods.fml.common.Loader.initializeMods(Loader.java:691)

        at cpw.mods.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:213)

        at net.minecraft.client.Minecraft.startGame(Minecraft.java:448)

        at net.minecraft.client.MinecraftAppletImpl.startGame(MinecraftAppletImpl.java:44)

        at net.minecraft.client.Minecraft.run(Minecraft.java:733)

        at java.lang.Thread.run(Unknown Source)

 

cpw.mods.fml.common.registry.GameRegistry.addRecipe(GameRegistry.java:239)
mod.tdm.TdmBase.load(TdmBase.java:34)

Error at line 34 of TdmBase.java, in the load method, at GameRegistry.addRecipe(args) you are giving a null.

check whether you are defining all the letters in your recipe, each letter is an ingredient. And check if all the items/blocks in the recipe are registered

All letters are defined, but I think that those items I used in crafting are unregistered. Could you explain it to me/give me a link where it's explained how to register items?

 

Edit: If you mean by typing public static ItemName under the public class BaseMod then yes I did that, for all items

Any ideas how to fix this? Anyone?

The source code is very helpful on this.

Ok, I will put in the source code as soon as I come back.

this is how i did it

"GameRegistry.addRecipe(new ItemStack(ObsidianSword), " O "," O "," R ",'O', ashtonsmod.CondensedObsidian,'R',blazerod); "

So, there are three possible null arguments:

-ObsidianSword

-CondensedObsidian

-blazerod

All those should be initialized before the addRecipe(args) line.

 

You can also try with

GameRegistry.addRecipe(new ItemStack(ObsidianSword), new Object[]{" O "," O "," R ",'O', ashtonsmod.CondensedObsidian,'R',blazerod});

Ok, so here is the BaseMod.class (TdmBase.java) code:

 

 

    package sins.tdm;

   

    import net.minecraft.block.Block;

    import net.minecraft.block.material.Material;

    import net.minecraft.creativetab.CreativeTabs;

    import net.minecraft.item.Item;

    import net.minecraft.item.ItemStack;

    import cpw.mods.fml.common.Mod;

    import cpw.mods.fml.common.Mod.Init;

    import cpw.mods.fml.common.event.FMLInitializationEvent;

    import cpw.mods.fml.common.network.NetworkMod;

    import cpw.mods.fml.common.registry.GameData;

    import cpw.mods.fml.common.registry.GameRegistry;

    import cpw.mods.fml.common.registry.LanguageRegistry;

    import net.minecraft.item.crafting.CraftingManager;

   

    @Mod(modid = TdmBase.modid, name = "Sorry no spoilers ", version = "1.0")

    @NetworkMod(clientSideRequired = true, serverSideRequired = false)

    public class TdmBase

    {

   

            public static final String modid = "sins_TDM";

         

         

            public static CreativeTabs tabTDM = new CreativeTabs("tabTDM") {

            public ItemStack getIconItemStack() {

                    return new ItemStack(TdmBase.barrel, 1, 0);

            }

    };

         

            public static Block barrel;

            public static Item cog;

            public static Item woodenWheel;

            public static Item reinforcedWheel;

            public static Item smallCannon;

            public static Item woodenChassis;

            public static Item reinforcedChassis;

         

            @Init

            public void load(FMLInitializationEvent event)

            {

                    reinforcedChassis = new ItemReinforcedChassis(7210).setUnlocalizedName("Reinforced chassis");

                    LanguageRegistry.addName(reinforcedChassis, "Reinforced chassis");

                    GameRegistry.addRecipe(new ItemStack(reinforcedChassis), new Object[]{

                    "WIW","CBC","WIW", 'W', TdmBase.reinforcedWheel, 'I', Item.ingotIron, 'C', TdmBase.cog, 'B', Block.blockIron});

   

                    woodenChassis = new ItemWoodenChassis(7209).setUnlocalizedName("Wooden chassis");

                    LanguageRegistry.addName(woodenChassis, "Wooden chassis");

                    GameRegistry.addRecipe(new ItemStack(woodenChassis), new Object[]{

                    "WSW","CPC","WSW", 'W', TdmBase.woodenWheel, 'S', Item.stick, 'C', TdmBase.cog, 'P', Block.planks});

                 

                    smallCannon = new ItemSmallCannon(7208).setUnlocalizedName("Small cannon");

                    LanguageRegistry.addName(smallCannon, "Small cannon");

                    GameRegistry.addRecipe(new ItemStack(smallCannon), new Object[]{

                    "I  "," I ","  I", 'I', Item.ingotIron});

                 

                    reinforcedWheel = new ItemReinforcedWheel(7207).setUnlocalizedName("Reinforced wheel");

                    LanguageRegistry.addName(reinforcedWheel, "Reinforced wheel");

                    GameRegistry.addRecipe(new ItemStack(reinforcedWheel), new Object[]{

                    "III","IPI","III", 'I', Item.ingotIron, 'P', Block.planks});

                 

                    woodenWheel = new ItemWoodenWheel(7206).setUnlocalizedName("Wooden wheel");

                    LanguageRegistry.addName(woodenWheel, "Wooden wheel");

                    GameRegistry.addRecipe(new ItemStack(woodenWheel), new Object[]{

                    "SSS","SPS","SSS", 'P', Block.planks, 'S', Item.stick});

                 

                    cog = new ItemCog(7205).setUnlocalizedName("Cog");

                    LanguageRegistry.addName(cog, "Cog");

                    GameRegistry.addRecipe(new ItemStack(cog), new Object[]{

                " S ","SPS"," S ", 'I', Block.planks, 'S', Item.stick});

                 

                    barrel = new BlockBarrel(500, Material.grass).setUnlocalizedName("Barrel").setHardness(2.0F).setResistance(0.0F).setStepSound(Block.soundWoodFootstep);

                    GameRegistry.registerBlock(barrel, modid + barrel.getUnlocalizedName2());

                    LanguageRegistry.addName(barrel, "Barrel");

                    GameRegistry.addRecipe(new ItemStack(barrel), new Object[]{

            "PCP","PCP","PCP", 'P', Block.planks, 'C', Item.gunpowder});

                 

                    LanguageRegistry.instance().addStringLocalization("itemGroup.tabTDM", "en_US", "No spoilers )");

            }

    }

 

 

 

Thank, you. This solved the problem

 

P.S. It wasn't necessary to use exclamation mark.