Какво се променя? Java [затворен] - java, minecraft

[SEVERE] java.lang.NoSuchMethodError: net.minecraft.server.ContainerEnchantTable.doEnchantment(Lnet/minecraft/server/EntityHuman;Ljava/util/List;IZ)Z
2012-04-09 13:34:42 [SEVERE]    at net.minecraft.server.mod_MultiplayerSupport.doEnchant(mod_MultiplayerSupport.java:80)
2012-04-09 13:34:42 [SEVERE]    at net.minecraft.server.mod_MultiplayerSupport.handlePacket(mod_MultiplayerSupport.java:51)
2012-04-09 13:34:42 [SEVERE]    at net.minecraft.server.ModLoaderMp.handleAllPackets(ModLoaderMp.java:110)
2012-04-09 13:34:42 [SEVERE]    at net.minecraft.server.Packet230ModLoader.handle(Packet230ModLoader.java:158)
2012-04-09 13:34:42 [SEVERE]    at net.minecraft.server.NetworkManager.b(NetworkManager.java:234)
2012-04-09 13:34:42 [SEVERE]    at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:118)
2012-04-09 13:34:42 [SEVERE]    at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.java:78)
2012-04-09 13:34:42 [SEVERE]    at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:557)
2012-04-09 13:34:42 [SEVERE]    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:455)
2012-04-09 13:34:42 [SEVERE]    at net.minecraft.server.ThreadServerApplication.run(SourceFile:490)
2012-04-09 13:34:42 [SEVERE] Unexpected exception
java.lang.NoSuchMethodError: net.minecraft.server.ContainerEnchantTable.doEnchantment(Lnet/minecraft/server/EntityHuman;Ljava/util/List;IZ)Z
at net.minecraft.server.mod_MultiplayerSupport.doEnchant(mod_MultiplayerSupport.java:80)
at net.minecraft.server.mod_MultiplayerSupport.handlePacket(mod_MultiplayerSupport.java:51)
at net.minecraft.server.ModLoaderMp.handleAllPackets(ModLoaderMp.java:110)
at net.minecraft.server.Packet230ModLoader.handle(Packet230ModLoader.java:158)
at net.minecraft.server.NetworkManager.b(NetworkManager.java:234)
at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:118)
at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.java:78)
at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:557)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:455)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:490)

Отговори:

"Няма такъв метод" предполага, че JARсъдържащи този клас, е остаряла. Някои обекти в кода извикват метод с подпис, който се различава от това, което е в JAR.