java.lang.IllegalAccessError: tried to access field net.minecraft.item.crafting.CraftingManager.field_77597_b from class mixac1.dangerrpg.init.RPGRecipes
at mixac1.dangerrpg.init.RPGRecipes.ownFindMatchingRecipe(RPGRecipes.java:286)
at mixac1.dangerrpg.inventory.ContainerRPGWorkbench.func_75130_a(ContainerRPGWorkbench.java:75)
at mixac1.dangerrpg.inventory.ContainerRPGWorkbench.<init>(ContainerRPGWorkbench.java:71)
at mixac1.dangerrpg.init.RPGGuiHandlers.getServerGuiElement(RPGGuiHandlers.java:34)
at cpw.mods.fml.common.network.NetworkRegistry.getRemoteGuiContainer(NetworkRegistry.java:243)
at cpw.mods.fml.common.network.internal.FMLNetworkHandler.openGui(FMLNetworkHandler.java:75)
at net.minecraft.entity.player.EntityPlayer.openGui(EntityPlayer.java:2209)
at mixac1.dangerrpg.block.BlockRPGWorkbench.func_149727_a(BlockRPGWorkbench.java:46)
at net.minecraft.server.management.ItemInWorldManager.func_73078_a(ItemInWorldManager.java:376)
at net.minecraft.network.NetHandlerPlayServer.func_147346_a(NetHandlerPlayServer.java:556)
at net.minecraft.network.play.client.C08PacketPlayerBlockPlacement.func_148833_a(SourceFile:60)
at net.minecraft.network.play.client.C08PacketPlayerBlockPlacement.func_148833_a(SourceFile:9)
at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212)
at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:165)
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)