java.lang.NullPointerException: Unexpected error

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java.lang.NullPointerException: Unexpected error
at xreliquary.util.RegistryHelper.getBlockRegistryName(RegistryHelper.java:28)
at xreliquary.items.ItemDestructionCatalyst.doExplosion(ItemDestructionCatalyst.java:111)
at xreliquary.items.ItemDestructionCatalyst.func_180614_a(ItemDestructionCatalyst.java:50)
at undefined.PlayerControllerOF.func_187099_a(PlayerControllerOF.java:88)
at net.minecraft.client.Minecraft.func_147121_ag(Minecraft.java:1518)
at net.minecraft.client.Minecraft.func_184117_aA(Minecraft.java:2184)
at net.minecraft.client.Minecraft.func_184118_az(Minecraft.java:1961)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1749)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1055)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:371)
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)

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