So, when i enter in my portal MINECRAFT give null pointer exception error:

This is my mod file

 

package net.minecraft.src;

import cpw.mods.fml.client.FMLClientHandler;
import cpw.mods.fml.common.*;
import cpw.mods.fml.common.event.FMLInitializationEvent;
import cpw.mods.fml.common.event.FMLPreInitializationEvent;
import cpw.mods.fml.common.network.NetworkRegistry;
import cpw.mods.fml.common.registry.*;
import net.minecraftforge.common.*;
import net.minecraft.src.ServerConfigurationManager;


public class mod_Glacia extends BaseMod
{
    public static final BiomeGenBase Glacia;
    public void preInit(FMLPreInitializationEvent var1)
    {
        DimensionManager.registerProviderType(87, WorldProviderGlacia.class, false);
        DimensionManager.registerDimension(87, 87);
    }


    public static int grassTop = 0;
    public static int grassSide = 0;
    public static int portalImage = 0;
    public static int sun = 0;
    public static int moon = 0;

    public static final Block GlacialBedrock = (new BlockGlacialBedrock(200, 1)).setBlockUnbreakable().setResistance(6000000.0F).setStepSound(Block.soundStoneFootstep).setBlockName("Glacial bedrock").disableStats().setCreativeTab(CreativeTabs.tabBlock);
    public static Block BlockGlacialDirt =  (new BlockGlacialDirt(201, 2)).setHardness(2.0F).setResistance(2.0F).setLightValue(0.0F).setLightOpacity(0).setBlockName("Glacial dirt").setCreativeTab(CreativeTabs.tabBlock);
    public static BlockGlacialGrass BlockGlacialGrass =  (BlockGlacialGrass)(new BlockGlacialGrass(202)).setHardness(2.0F).setResistance(2.0F).setLightValue(0.4F).setLightOpacity(0).setBlockName("Glacial grass").setCreativeTab(CreativeTabs.tabBlock);
    public static Block BlockGlacialStone = (new BlockGlacialStone(203, 4)).setHardness(10.0F).setResistance(10.0F).setLightValue(0.0F).setLightOpacity(0).setBlockName("Glacial stone").setCreativeTab(CreativeTabs.tabBlock);
    public static Block BlockGlacialMagicStone = (new BlockGlacialMagicStone(204, 6)).setHardness(10.0F).setResistance(10.0F).setLightValue(0.0F).setLightOpacity(0).setBlockName("Glacial magic stone").setCreativeTab(CreativeTabs.tabBlock);
    public static BlockGlaciaPortal BlockGlaciaPortal = (BlockGlaciaPortal)(new BlockGlaciaPortal(205, 14)).setBlockUnbreakable().setResistance(6000000.0F).setBlockName("Glacial portal");

    public String Version()
    {
        return "1.0";
    }

    public String getVersion()
    {
        return "1.0";
    }

    public void load()
    {
        ModLoader.addName(GlacialBedrock, "Glacial bedrock");
        ModLoader.addName(BlockGlacialDirt, "Glacial dirt");
        ModLoader.addName(BlockGlacialGrass, "Glacial grass");
        ModLoader.addName(BlockGlacialStone, "Glacial stone");
        ModLoader.addName(BlockGlacialMagicStone, "Glacial magic stone");
        ModLoader.addName(BlockGlaciaPortal, "Glacial portal");
        ModLoader.registerBlock(GlacialBedrock);
        ModLoader.registerBlock(BlockGlacialDirt);
        ModLoader.registerBlock(BlockGlacialGrass);
        ModLoader.registerBlock(BlockGlacialStone);
        ModLoader.registerBlock(BlockGlacialMagicStone);
        ModLoader.registerBlock(BlockGlaciaPortal);
ModLoader.addRecipe(new ItemStack(BlockGlacialMagicStone, 14), new Object[] {"123", "456", "789", '1', Item.snowball, '2', Item.snowball, '3', Item.snowball, '4', Item.snowball, '5', Item.diamond, '6', Item.snowball, '7', Item.snowball, '8', Item.snowball, '9', Item.snowball});
    }

    static
    {
    Glacia = new BiomeGenGlacia(31).setTemperatureRainfall(0.9F, 0.3F).setMinMaxHeight(0.1F, 0.25F).setColor(0xfa9418).setBiomeName("Glacia");
    }
}

 

 

 

and this is the ONENTITYCOLLIDEDWITHBLOCK code on BlockMYPORTAL

 

@Override
public void onEntityCollidedWithBlock(World par1World, int par2, int par3, int par4, Entity par5Entity)
{
if (par5Entity.ridingEntity == null && par5Entity.riddenByEntity == null && par5Entity instanceof EntityPlayerMP)
{
if (par5Entity instanceof EntityPlayerMP)
{
EntityPlayerMP thePlayer = (EntityPlayerMP) par5Entity;
if (par5Entity.dimension != 87)
{
ModLoader.getMinecraftInstance().thePlayer.timeUntilPortal = 100;
thePlayer.mcServer.getConfigurationManager().transferPlayerToDimension(thePlayer, 0);
}
else
{
ModLoader.getMinecraftInstance().thePlayer.timeUntilPortal = 100;
thePlayer.mcServer.getConfigurationManager().transferPlayerToDimension(thePlayer, 87, new GlaciaTeleporter(thePlayer.mcServer.worldServerForDimension(87), null));
}
}
}
}

 

I don't know where is the error

And where's the error report you got?