[Server Help] Server not working after host pc is turned off

[Ezpay]

I have been running a Tekkit server for me and my friend to play on together from my home PC, except after I restart my computer or turn it on, neither him or myself can join the server. So far the only way to fix this problem is to generate a fresh world, but I would like to find a way around it. So far it has happened twice.

When I run the server after my computer has been off I am greeted with this lengthy error message: (I have no idea what this means)

2014-01-12 13:34:18 [sEVERE] [ForgeModLoader] A fatal exception occurred during

the server starting event

java.lang.NullPointerException

at universalelectricity.prefab.flag.ModFlag.readFromNBT(ModFlag.java:34)

at universalelectricity.prefab.flag.ModFlag.<init>(ModFlag.java:27)

at atomicscience.ZhuYao.serverStarting(ZhuYao.java:719)

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:494)

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

:74)

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

ronizedEventHandler.java:45)

at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)

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

a:296)

at com.google.common.eventbus.EventBus.post(EventBus.java:267)

at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadContro

ller.java:192)

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

er.java:172)

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

:74)

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

ronizedEventHandler.java:45)

at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)

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

a:296)

at com.google.common.eventbus.EventBus.post(EventBus.java:267)

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

ler.java:103)

at cpw.mods.fml.common.Loader.serverStarting(Loader.java:740)

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

ndler.java:314)

at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(Dedicated

Server.java:205)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:431)

at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)

[plowmanplow]

How are you shutting down the server? Are you just closing the window it is running in? The proper way to stop the server is to type "stop" in the console (or "/stop" in game). If you don't tell the server to shut down cleanly it can corrupt the world files.

[Teraku]

Yeah, I think you're not properly closing your server. Try using /stop to stop your server, then close the window or shut down your PC.