Migrating from Minecraft to Craftbukkit

Hi Everyone,
We recently decided that we wanted to move from Minecraft to Craftbukkit server, in order to take advantage of the powerful features it has to offer. I put our world in the worldstorage folder, but when I attemp to start I get these errors.
OS: Ubuntu Server 11.04 x86
CPU: Pentium 4 M 1.6 Ghz
RAM: 1024M DDR
Packages
-vsftpd
-openssh-server
-python-software-properties
-sun-java6-jre
-sun-java6-plugin
No wrappers, mods.
Server start command

Code:

java -Xmx1024M -Xms64M -XX: +UseConcMarkSweepGC -XX: +CMSIncrementalPacing -XX:ParallelGCThreads=1 -XX:AggressiveOpts -jar craftbukkit-0.0.1-SNAPSHOT.jar nogui

server.log

Code:

2011-08-20 22:55:31 [INFO] Starting minecraft server version Beta 1.7.3
2011-08-20 22:55:31 [INFO] Loading properties
2011-08-20 22:55:31 [INFO] Starting Minecraft server on *:25565
2011-08-20 22:55:32 [INFO] This server is running Craftbukkit version git-Bukkit-0.0.0-980-g4ed23b1-b1060jnks (MC: 1.7.3)
2011-08-20 22:55:32 [INFO] Preparing level "world"
2011-08-20 22:55:32 [INFO] ---- Migration of old nether folder required ----
2011-08-20 22:55:32 [INFO] Unfortunately due to the way that Minecraft implemented multiworld support in 1.6, Bukkit requires that you move your nether folder to a new location in order to operate correctly.
2011-08-20 22:55:32 [INFO] We will move this folder for you, but it will mean that you need to move it back should you wish to stop using Bukkit in the future.
2011-08-20 22:55:32 [INFO] Attempting to move world/DIM-1 to world_nether/DIM-1...
2011-08-20 22:55:32 [SEVERE] Could not create path for world_nether/DIM-1!
2011-08-20 22:55:32 [INFO] ---- Migration of old nether folder failed ----
2011-08-20 22:55:32 [SEVERE] java.io.FileNotFoundException: ./world_nether/session.lock (No such file or directory)
2011-08-20 22:55:32 [SEVERE]     at java.io.FileOutputStream.open(Native Method)
2011-08-20 22:55:32 [SEVERE]     at java.io.FileOutputStream.<init>(FileOutputStream.java:194)
2011-08-20 22:55:32 [SEVERE]     at java.io.FileOutputStream.<init>(FileOutputStream.java:145)
2011-08-20 22:55:32 [SEVERE]     at net.minecraft.server.PlayerNBTManager.f(PlayerNBTManager.java:41)
2011-08-20 22:55:32 [SEVERE]     at net.minecraft.server.PlayerNBTManager.<init>(PlayerNBTManager.java:35)
2011-08-20 22:55:32 [SEVERE]     at net.minecraft.server.ServerNBTManager.<init>(SourceFile:17)
2011-08-20 22:55:32 [SEVERE]     at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:211)
2011-08-20 22:55:32 [SEVERE]     at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:149)
2011-08-20 22:55:32 [SEVERE]     at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:337)
2011-08-20 22:55:32 [SEVERE]     at net.minecraft.server.ThreadServerApplication.run(SourceFile:422)
2011-08-20 22:55:32 [SEVERE] java.lang.RuntimeException: Failed to check session lock, aborting
2011-08-20 22:55:32 [SEVERE]     at net.minecraft.server.PlayerNBTManager.f(PlayerNBTManager.java:50)
2011-08-20 22:55:32 [SEVERE]     at net.minecraft.server.PlayerNBTManager.<init>(PlayerNBTManager.java:35)
2011-08-20 22:55:32 [SEVERE]     at net.minecraft.server.ServerNBTManager.<init>(SourceFile:17)
2011-08-20 22:55:32 [SEVERE]     at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:211)
2011-08-20 22:55:32 [SEVERE]     at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:149)
2011-08-20 22:55:32 [SEVERE]     at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:337)
2011-08-20 22:55:32 [SEVERE]     at net.minecraft.server.ThreadServerApplication.run(SourceFile:422)
2011-08-20 22:55:32 [SEVERE] Unexpected exception
java.lang.RuntimeException: Failed to check session lock, aborting
    at net.minecraft.server.PlayerNBTManager.f(PlayerNBTManager.java:50)
    at net.minecraft.server.PlayerNBTManager.<init>(PlayerNBTManager.java:35)
    at net.minecraft.server.ServerNBTManager.<init>(SourceFile:17)
    at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:211)
    at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:149)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:337)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:422)

 

I think is a permissions issue, try running bukkit with sudo?

 

I just tried what you suggested but still get the same error? I'm using Ahtenus script.

 

Based on the exception you are getting, I think you need to migrate your minecraft server's nether world to a diffrent folder. This can be accomplished by opening your main world's folder and moving the sub-folder called DIM-1 to a different folder named world_nether. i.e. move "/world/DIM-1" to "/world_nether/DIM-1"

 

Okay, i got it working so I have to copy worldstorage!