CoreProtect - Could Not Pass Event EntityExplodeEvent

[Bangers]

Title: CoreProtect - Could Not Pass Event EntityExplodeEvent

Version: 3.1.2

OS: Windoes XP

Java Version: Version 7 Update 7

Description of Problem:

someone's Steam Engines exploded, but the explosion was stopped (by Essentials?). It started causing lag in the area and eventually crashed the server. Using /co inspect in that 'blast' area caused severe lag. I managed to fix it by overwriting that part of the log using worldedit to create and then remove a large block of stone covering the supposed blast area.

Error Messages:

Error Log:

2012-10-25 04:58:19 [sEVERE] Could not pass event EntityExplodeEvent to CoreProtect

org.bukkit.event.EventException

    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:304)

    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)

    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:482)

    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:467)

    at net.minecraft.server.Explosion.a(Explosion.java:202)

    at net.minecraft.server.World.createExplosion(World.java:1565)

    at net.minecraft.server.WorldServer.createExplosion(WorldServer.java:245)

    at net.minecraft.server.World.explode(World.java:1557)

    at buildcraft.energy.Engine.addEnergy(Engine.java:90)

    at buildcraft.energy.EngineStone.burn(EngineStone.java:66)

    at buildcraft.energy.TileEngine.q_(TileEngine.java:158)

    at net.minecraft.server.World.tickEntities(World.java:1190)

    at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:569)

    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:467)

    at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)

Caused by: java.lang.OutOfMemoryError: unable to create new native thread

    at java.lang.Thread.start0(Native Method)

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

    at aux.aux.aux.AUx.Code(CoreProtectionEntityListener.java:157)

    at sun.reflect.GeneratedMethodAccessor106.invoke(Unknown Source)

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

    at java.lang.reflect.Method.invoke(Unknown Source)

    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302)

    ... 14 more