[Error with Server [java.lang.NullPointerException]]

Could it maybe be the world itself?

[Error with Server [java.lang.NullPointerException]]

No, it still said the same thing.. thanks though

[Error with Server [java.lang.NullPointerException]]

Well, I received another error today on my server, I am using MCPC+ #251, and all of the other server files. I am able to log on successfully, but whenever my friend gets on, he crashes, and so does the server. This is the report:

---- Minecraft Crash Report ----
// Oops.

Time: 3/30/14 10:10 AM
Description: Exception in server tick loop

java.lang.NullPointerException
at co.uk.flansmods.common.teams.TeamsManager.tick(TeamsManager.java:136)
at co.uk.flansmods.common.CommonTickHandler.sTick(CommonTickHandler.java:32)
at co.uk.flansmods.common.CommonTickHandler.tickEnd(CommonTickHandler.java:25)
at cpw.mods.fml.common.SingleIntervalHandler.tickEnd(SingleIntervalHandler.java:34)
at cpw.mods.fml.common.FMLCommonHandler.tickEnd(FMLCommonHandler.java:141)
at cpw.mods.fml.common.FMLCommonHandler.onPostServerTick(FMLCommonHandler.java:274)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:813)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:659)
at net.minecraft.server.ThreadMinecraftServer.run(ThreadMinecraftServer.java:16)
 

It seems like it has something to do with teams in flans mod, but I can't be sure. Is it the MCPC+ Build? Or is it a Bug with flans mod?
He also disconnects with the message "Internal Server Error" Which I have encountered before while trying to run Galacticraft and MCPC+ a while back. Is there a fix for This?

Because I don't crash, it just seems to be with him. I can log on just fine.

Help would be appreciated, 

 

Thanks, Quantum.

 

[Error with Server [java.lang.ArrayIndexOutOfBoundsException]]

Thanks!

[Error with Server [java.lang.ArrayIndexOutOfBoundsException]]

Well, I just booted up my server today, and got on safely. However, when my friend joined, it automatically crashed with the error: java.lang.ArrayIndexOutOfBoundsException: -1

Then, I booted it up again, my friend logged on first just fine, but when I logged on this time, it crashed. It seems that 2 people can't be on at the same time or else it crashes with the error above.

---- Minecraft Crash Report ----
// Sorry 

Time: 3/28/14 3:50 PM
Description: Exception in server tick loop

java.lang.ArrayIndexOutOfBoundsException: -1
	at java.util.ArrayList.elementData(Unknown Source)
	at java.util.ArrayList.get(Unknown Source)
	at net.minecraft.server.management.ServerConfigurationManager.func_72374_b(ServerConfigurationManager.java:1130)
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:914)
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:330)
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:777)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:659)
	at net.minecraft.server.ThreadMinecraftServer.run(ThreadMinecraftServer.java:16)

 

I am using the latest build of Attack of the B-Team server, Using MCPC+. It worked before, and it also seems that the error comes from the world itself, where I tried to make another one, and it worked. I am just wondering if there is a fix for this, because it would be quite sad if we lost all work.

Could this be a MCPC+ error? 

 

Thanks, Quantum.