java.util.MissingFormatArgumentException: Format specifier '%s'

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java.util.MissingFormatArgumentException: Format specifier '%s'
at java.util.Formatter.format(Formatter.java:2519)
at java.util.Formatter.format(Formatter.java:2455)
at java.lang.String.format(String.java:2940)
at modtweaker2.mods.exnihilo.handlers.Hammer.removeRecipe(Hammer.java:182)
at undefined.Retardscraft3.__script__(retardscraft3.zs:51)
at undefined.__ZenMain__.run(retardscraft3.zs)
at minetweaker.runtime.MTTweaker.load(MTTweaker.java:163)
at minetweaker.MineTweakerImplementationAPI.reload(MineTweakerImplementationAPI.java:656)
at minetweaker.MineTweakerImplementationAPI$1.execute(MineTweakerImplementationAPI.java:83)
at minetweaker.MineTweakerImplementationAPI$19.execute(MineTweakerImplementationAPI.java:642)
at minetweaker.mc1710.server.MCServer$MCCommand.func_71515_b(MCServer.java:124)
at net.minecraft.command.CommandHandler.func_71556_a(CommandHandler.java:94)
at net.minecraft.network.NetHandlerPlayServer.func_147361_d(NetHandlerPlayServer.java:739)
at net.minecraft.network.NetHandlerPlayServer.func_147354_a(NetHandlerPlayServer.java:718)
at net.minecraft.network.play.client.C01PacketChatMessage.func_148833_a(SourceFile:37)
at net.minecraft.network.play.client.C01PacketChatMessage.func_148833_a(SourceFile:9)
at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:659)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:111)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427)
at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)

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