HELP server crashing on startup

[Madbull12]

Launcher/pack Version: 2.1.1

Operating System: Windows 7

Description of Problem: Server crashes on launch (and will not allow people to join)

Was first noticed by a user who tried to pull a lever, which didn't work, and then tried to open a chest, again which didn't work. They then left the server and tried to reconnect, but found that they could not rejoin it.

Log:

2012-03-18 17:31:57 [sEVERE] Unexpected exception

java.lang.IllegalArgumentException: Slot 207 is already occupied by dan200.computer.shared.BlockComputer@3c36be1e when adding dan200.computer.shared.BlockComputer@2dfbc274

at net.minecraft.server.Block.<init>(Block.java:175)

at net.minecraft.server.BlockContainer.<init>(BlockContainer.java:12)

at dan200.computer.shared.BlockComputerBase.<init>(BlockComputerBase.java:24)

at dan200.computer.shared.BlockComputer.<init>(BlockComputer.java:19)

at net.minecraft.server.mod_ComputerCraft.<init>(mod_ComputerCraft.java:51)

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)

at java.lang.reflect.Constructor.newInstance(Unknown Source)

at java.lang.Class.newInstance0(Unknown Source)

at java.lang.Class.newInstance(Unknown Source)

at net.minecraft.server.ModLoader.addMod(ModLoader.java:179)

at net.minecraft.server.ModLoader.readFromModFolder(ModLoader.java:955)

at net.minecraft.server.ModLoader.init(ModLoader.java:683)

at net.minecraft.server.ModLoader.Init(ModLoader.java:1357)

at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:102)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:411)

at net.minecraft.server.ThreadServerApplication.run(SourceFile:465)

2012-03-18 17:31:57 [FINER] THROW

java.lang.RuntimeException: Exception occured in ModLoader

at net.minecraft.server.ModLoader.ThrowException(ModLoader.java:1292)

at net.minecraft.server.ModLoader.ThrowException(ModLoader.java:1297)

at net.minecraft.server.ModLoader.addMod(ModLoader.java:193)

at net.minecraft.server.ModLoader.readFromModFolder(ModLoader.java:955)

at net.minecraft.server.ModLoader.init(ModLoader.java:683)

at net.minecraft.server.ModLoader.Init(ModLoader.java:1357)

at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:102)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:411)

at net.minecraft.server.ThreadServerApplication.run(SourceFile:465)

Caused by: java.lang.IllegalArgumentException: Slot 207 is already occupied by dan200.computer.shared.BlockComputer@3c36be1e when adding dan200.computer.shared.BlockComputer@2dfbc274

at net.minecraft.server.Block.<init>(Block.java:175)

at net.minecraft.server.BlockContainer.<init>(BlockContainer.java:12)

at dan200.computer.shared.BlockComputerBase.<init>(BlockComputerBase.java:24)

at dan200.computer.shared.BlockComputer.<init>(BlockComputer.java:19)

at net.minecraft.server.mod_ComputerCraft.<init>(mod_ComputerCraft.java:51)

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)

at java.lang.reflect.Constructor.newInstance(Unknown Source)

at java.lang.Class.newInstance0(Unknown Source)

at java.lang.Class.newInstance(Unknown Source)

at net.minecraft.server.ModLoader.addMod(ModLoader.java:179)

... 6 more

2012-03-18 17:31:57 [sEVERE] Unexpected exception

java.lang.RuntimeException: Exception occured in ModLoader

at net.minecraft.server.ModLoader.ThrowException(ModLoader.java:1292)

at net.minecraft.server.ModLoader.ThrowException(ModLoader.java:1297)

at net.minecraft.server.ModLoader.addMod(ModLoader.java:193)

at net.minecraft.server.ModLoader.readFromModFolder(ModLoader.java:955)

at net.minecraft.server.ModLoader.init(ModLoader.java:683)

at net.minecraft.server.ModLoader.Init(ModLoader.java:1357)

at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:102)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:411)

at net.minecraft.server.ThreadServerApplication.run(SourceFile:465)

Caused by: java.lang.IllegalArgumentException: Slot 207 is already occupied by dan200.computer.shared.BlockComputer@3c36be1e when adding dan200.computer.shared.BlockComputer@2dfbc274

at net.minecraft.server.Block.<init>(Block.java:175)

at net.minecraft.server.BlockContainer.<init>(BlockContainer.java:12)

at dan200.computer.shared.BlockComputerBase.<init>(BlockComputerBase.java:24)

at dan200.computer.shared.BlockComputer.<init>(BlockComputer.java:19)

at net.minecraft.server.mod_ComputerCraft.<init>(mod_ComputerCraft.java:51)

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)

at java.lang.reflect.Constructor.newInstance(Unknown Source)

at java.lang.Class.newInstance0(Unknown Source)

at java.lang.Class.newInstance(Unknown Source)

at net.minecraft.server.ModLoader.addMod(ModLoader.java:179)

... 6 more

2012-03-18 17:31:57 [sEVERE] Unexpected exception

java.lang.RuntimeException: ModLoader has failed to initialize.

at net.minecraft.server.ModLoader.ThrowException(ModLoader.java:1292)

at net.minecraft.server.ModLoader.init(ModLoader.java:715)

at net.minecraft.server.ModLoader.Init(ModLoader.java:1357)

at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:102)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:411)

at net.minecraft.server.ThreadServerApplication.run(SourceFile:465)

Caused by: java.lang.RuntimeException: Exception occured in ModLoader

at net.minecraft.server.ModLoader.ThrowException(ModLoader.java:1292)

at net.minecraft.server.ModLoader.ThrowException(ModLoader.java:1297)

at net.minecraft.server.ModLoader.addMod(ModLoader.java:193)

at net.minecraft.server.ModLoader.readFromModFolder(ModLoader.java:955)

at net.minecraft.server.ModLoader.init(ModLoader.java:683)

... 4 more

Caused by: java.lang.IllegalArgumentException: Slot 207 is already occupied by dan200.computer.shared.BlockComputer@3c36be1e when adding dan200.computer.shared.BlockComputer@2dfbc274

at net.minecraft.server.Block.<init>(Block.java:175)

at net.minecraft.server.BlockContainer.<init>(BlockContainer.java:12)

at dan200.computer.shared.BlockComputerBase.<init>(BlockComputerBase.java:24)

at dan200.computer.shared.BlockComputer.<init>(BlockComputer.java:19)

at net.minecraft.server.mod_ComputerCraft.<init>(mod_ComputerCraft.java:51)

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)

at java.lang.reflect.Constructor.newInstance(Unknown Source)

at java.lang.Class.newInstance0(Unknown Source)

at java.lang.Class.newInstance(Unknown Source)

at net.minecraft.server.ModLoader.addMod(ModLoader.java:179)

... 6 more

Anyone know why this is happening, and if there is a fix?

[widders]

For starters:

http://forums.technicpack.net/index.php/topic,2797.0.html

For seconds, it does say what is going on, the computer craft default block IDs aren't available. I'd guess you've either tried to dump the new install on top of an old one, or just tried to put computercraft into your old tekkit install

[Madbull12]

so how do I fix it?

(sorry I'm a bit of a newb)