world load crash

[aaron summers]

Title: world load crash

Version: 0.5.1

OS: windows 7 home premium

Java Version: Java 7 update 11

Description of Problem:

when the server attempts to load existing world it crashes

Error Messages:

1)

2013-01-22 18:29:53 [sEVERE] [Minecraft] Encountered an unexpected exception Con

currentModificationException

Error Log:

2013-01-22 18:29:53 [sEVERE] [Minecraft] Encountered an unexpected exception Con

currentModificationException

java.util.ConcurrentModificationException

        at java.util.HashMap$HashIterator.nextEntry(Unknown Source)

        at java.util.HashMap$KeyIterator.next(Unknown Source)

        at immibis.chunkloader.DimensionalAnchors.loadForcedWorlds(DimensionalAn

chors.java:189)

        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

        at java.lang.reflect.Method.invoke(Unknown Source)

        at cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContain

er.java:485)

        at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)

        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

        at java.lang.reflect.Method.invoke(Unknown Source)

        at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java

:69)

        at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(Synch

ronizedEventHandler.java:45)

        at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)

        at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.jav

a:300)

        at com.google.common.eventbus.EventBus.post(EventBus.java:268)

        at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadControll

er.java:140)

        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

        at java.lang.reflect.Method.invoke(Unknown Source)

        at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java

:69)

        at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(Synch

ronizedEventHandler.java:45)

        at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)

        at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.jav

a:300)

        at com.google.common.eventbus.EventBus.post(EventBus.java:268)

        at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadControl

ler.java:83)

        at cpw.mods.fml.common.Loader.serverStarting(Loader.java:700)

        at cpw.mods.fml.common.FMLCommonHandler.handleServerStarting(FMLCommonHa

ndler.java:309)

        at ho.c(DedicatedServer.java:198)

        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:458)

        at fy.run(SourceFile:849)