Solved Warning task of Citizens generated an exception

I'm creating some guard/bouncers on my server. I've set the radius, addflags, equipped, and added a line of humorous text to the four I've made. Come nightfall, they don't attack any of the mobs I've added flags to. They are all set aggressive. All they do is stand there. They don't look at me, (and no, it's not turned off) and they don't talkclose either(and yes it is selected). I just happened to look at my server log and seen the warning message on there and thought, hmm, could that be it? I'm running vista 64 SP2, its x86, Hamachi 2, java version 1.7.0, java SE runtime Environment build 1.7.0-b147, java HotSpot 64-bit server VM build 21.0-b17, mixed mode. The plugins i have are AuthMe, ChatManager, CivilizedSpawn, CreeperHeal, MotherNature, Iconomy, ModifyWorld, PermissionsEx, Lockette, noEnderman, and WorldEdit. Here's the server log with the warning, and thanks for the help.

 

Yeah, this plugin is severely outdated and most features do not work..

You are best to wait for an update.

 

That might be part of the problem, but all the other npc's I created stopped "talking and looking" too, and they were working fine. Has to be something else going on. Here's a copy of the log so you don't have to open the attachment.

13:34:06 [INFO] Fetching addPacket for removed entity
13:34:06 [INFO] Fetching addPacket for removed entity
13:34:06 [INFO] Fetching addPacket for removed entity
13:34:06 [INFO] Fetching addPacket for removed entity
13:34:06 [INFO] Fetching addPacket for removed entity
13:34:06 [INFO] Fetching addPacket for removed entity
13:34:06 [INFO] [Citizens] Loaded 122 NPCs.
13:34:06 [INFO] [Citizens] Loaded 0 quests.
13:34:06 [WARNING] Task of 'Citizens' generated an exception
java.lang.NoSuchMethodError: net.citizensnpcs.resources.npclib.PathNPC.f(Lnet/mi
necraft/server/EntityZ
at net.citizensnpcs.resources.npclib.PathNPC.isInSight(PathNPC.java:252)
at net.citizensnpcs.resources.npclib.PathNPC.updateTarget(PathNPC.java:1
09)
at net.citizensnpcs.resources.npclib.PathNPC.moveTick(PathNPC.java:57)
at net.citizensnpcs.resources.npclib.HumanNPC.doTick(HumanNPC.java:101)
at net.citizensnpcs.TickTask.run(TickTask.java:32)
at org.bukkit.craftbukkit.scheduler.CraftScheduler.mainThreadHeartbeat(C
raftScheduler.java:137)
at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:482)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:414)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)
13:34:06 [WARNING] Task of 'Citizens' generated an exception
java.lang.NoSuchMethodError: net.citizensnpcs.resources.npclib.PathNPC.f(Lnet/mi
necraft/server/EntityZ
at net.citizensnpcs.resources.npclib.PathNPC.isInSight(PathNPC.java:252)
at net.citizensnpcs.resources.npclib.PathNPC.updateTarget(PathNPC.java:1
09)
at net.citizensnpcs.resources.npclib.PathNPC.moveTick(PathNPC.java:57)
at net.citizensnpcs.resources.npclib.HumanNPC.doTick(HumanNPC.java:101)
at net.citizensnpcs.TickTask.run(TickTask.java:32)
at org.bukkit.craftbukkit.scheduler.CraftScheduler.mainThreadHeartbeat(C
raftScheduler.java:137)
at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:482)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:414)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)
13:34:06 [WARNING] Task of 'Citizens' generated an exception
java.lang.NoSuchMethodError: net.citizensnpcs.resources.npclib.PathNPC.f(Lnet/mi
necraft/server/EntityZ
at net.citizensnpcs.resources.npclib.PathNPC.isInSight(PathNPC.java:252)
at net.citizensnpcs.resources.npclib.PathNPC.updateTarget(PathNPC.java:1
09)
at net.citizensnpcs.resources.npclib.PathNPC.moveTick(PathNPC.java:57)
at net.citizensnpcs.resources.npclib.HumanNPC.doTick(HumanNPC.java:101)
at net.citizensnpcs.TickTask.run(TickTask.java:32)
at org.bukkit.craftbukkit.scheduler.CraftScheduler.mainThreadHeartbeat(C
raftScheduler.java:137)
at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:482)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:414)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)
13:34:06 [WARNING] Can't keep up! Did the system time change, or is the server o
verloaded?
13:38:51 [INFO] [AuthMe] Player Revenge logged in!
13:40:49 [INFO] Reached end of stream
13:40:49 [INFO] Reached end of stream
13:43:45 [INFO] Reached end of stream
13:44:04 [INFO] [MotherNature] Server is now raining.
13:45:10 [INFO] <[Owner] Revenge> guard bodyguard
>

 

Did you ever solve this? Because this is happening to me even now after there have been updates..

 

The problem was that citizens wasn't up to date with the latest recommended CB build. They have been slow to get their updates out so I removed it from my plugins until they work out citizens 2. It did work for me when it was updated to the CB build. Right now it is updated to 1.2.5-R1.0 so if you are running the latest CB build that is probably your problem.