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java.lang.NullPointerException: Ticking entity	at vazkii.psi.common.spell.operator.entity.PieceOperatorClosestToPoint.execute(PieceOperatorClosestToPoint.java:48)	at vazkii.psi.api.spell.CompiledSpell$Action.execute(CompiledSpell.java:91)	at vazkii.psi.api.spell.CompiledSpell.execute(CompiledSpell.java:57)	at vazkii.psi.api.spell.CompiledSpell.safeExecute(CompiledSpell.java:67)	at vazkii.psi.common.entity.EntitySpellProjectile.cast(EntitySpellProjectile.java:189)	at vazkii.psi.common.entity.EntitySpellProjectile.func_70184_a(EntitySpellProjectile.java:173)	at net.minecraft.entity.projectile.EntityThrowable.func_70071_h_(SourceFile:204)	at vazkii.psi.common.entity.EntitySpellProjectile.func_70071_h_(EntitySpellProjectile.java:130)	at net.minecraft.world.World.func_72866_a(World.java:1860)	at net.minecraft.world.World.func_72870_g(World.java:1829)	at net.minecraft.world.World.func_72939_s(World.java:1661)	at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:2089)	at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1024)	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:349)	at net.minecraft.client.main.Main.main(SourceFile:124)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:483)	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)