PLS help fast! i got an error and idk what it says ...

Hey Guys!

I just installed Buildcraft and IndustrialCraft on my Server and now i everytime when i start i get this error :
Unexpected exception
java.lang.NoSuchMethodError: net.minecraft.server.Block.isAirBlock(Lnet/minecraft/server/World;III)Z
at net.minecraft.server.World.isEmpty(World.java:255)
at net.minecraft.server.World.a(World.java:218)
at net.minecraft.server.WorldProviderHell.canSpawn(SourceFile:37)
at net.minecraft.server.World.canSpawn(World.java:104)
at net.minecraft.server.World.c(World.java:202)
at net.minecraft.server.World.<init>(World.java:150)
at net.minecraft.server.WorldServer.<init>(WorldServer.java:27)
at net.minecraft.server.SecondaryWorldServer.<init>(SecondaryWorldServer.java:8)
at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:224)
at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:155)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:351)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:417)

Common guys pls help me i installed this : modloadermp modloader minecraftforge and buildcrafz and industrialcraft

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

I have the same exact issue! please help

 

CraftBukkit isn't moddable like the vanilla minecraft server. Installing mods in CraftBukkit is normally not possible. That's what plugins are for.

Ok, after reading some more it seems those mods were now ported in a way that should be Bukkit compatible. But you have to use the exact correct version of CraftBukkit and those mods that fit together, or you'll get random problems (like the above) with plugins. Many plugins will stop working in such a modded CraftBukkit (e.g. Spout will definitely NOT work).

Overall it is not supported by the bukkit team to mod the craftbukkit.jar, so you'll be better off searching for help from the mod makers.

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Thanks verymuch i will ask the modmakers