Hello my server crashes from the last time errors. etc.: java.lang.NullPointerException at net.minecraft.server.World.a(World.java:2455) at net.minecraft.server.EntityTameableAnimal.getOwner(SourceFile:108) at net.minecraft.server.PathfinderGoalFollowOwner.a(SourceFile:34) at net.minecraft.server.PathfinderGoalSelector.a(SourceFile:50) at net.minecraft.server.EntityLiving.bc(EntityLiving.java:1216) at net.minecraft.server.EntityLiving.d(EntityLiving.java:1091) at net.minecraft.server.EntityAgeable.d(EntityAgeable.java:36) at net.minecraft.server.EntityAnimal.d(SourceFile:32) at net.minecraft.server.EntityWolf.d(EntityWolf.java:98) at net.minecraft.server.EntityLiving.h_(EntityLiving.java:447) at net.minecraft.server.EntityWolf.h_(EntityWolf.java:108) at net.minecraft.server.World.entityJoinedWorld(World.java:1239) at net.minecraft.server.WorldServer.entityJoinedWorld(WorldServer.java:498) at net.minecraft.server.World.playerJoinedWorld(World.java:1221) at net.minecraft.server.World.tickEntities(World.java:1119) at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:565) at net.minecraft.server.DedicatedServer.q(DedicatedServer.java:212) at net.minecraft.server.MinecraftServer.p(MinecraftServer.java:474) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:406) at net.minecraft.server.ThreadServerApplication.run(SourceFile:539) What's that? Help me please, but this crash and stop my server. Sorry for my bad English.