again

Last tick 0.22015558s ago."Server thread" RUNNABLE
    at java.util.HashMap.putVal(HashMap.java:641)
    at java.util.HashMap.put(HashMap.java:611)
    at net.minecraft.nbt.NBTTagCompound.func_74768_a(NBTTagCompound.java:98)
    at universalteam.universalcore.world.retrogen.RetroGenSaveData.func_76187_b(RetroGenSaveData.java:67)
    at net.minecraft.world.storage.MapStorage.func_75747_a(SourceFile:87)
    at net.minecraft.world.storage.MapStorage.func_75744_a(SourceFile:75)
    at net.minecraft.world.WorldServer.func_73042_a(WorldServer.java:1121)
    at net.minecraft.world.WorldServer.func_73044_a(WorldServer.java:1084)
    at org.bukkit.craftbukkit.v1_7_R4.CraftWorld.save(CraftWorld.java:797)
    at com.wimbli.WorldBorder.WorldFillTask.reportProgress(WorldFillTask.java:393)
    at com.wimbli.WorldBorder.WorldFillTask.run(WorldFillTask.java:169)
    at org.bukkit.craftbukkit.v1_7_R4.scheduler.CraftTask.run(CraftTask.java:71)
    at org.bukkit.craftbukkit.v1_7_R4.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:346)
    at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:905)
    at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:432)
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:841)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:693)
    at java.lang.Thread.run(Thread.java:748)