[Command blocks]

Whatever is in the command block.

Here you go: spawnpoint @p 30 21 140

the numbers can be different, same result

[Command blocks]

It looks like your command block is setting null to your spawn point, let's see your code.

What code do you need?

[Command blocks]

This is what the server says: [WARNING] Failed to handle packet for "player"/109.72.33.186: java.lang.NullPointerException

java.lang.NullPointerException

at qx.a(EntityPlayer.java:1542)

at gm.a(ServerConfigurationManager.java:336)

at iv.a(NetServerHandler.java:826)

at cx.a(SourceFile:30)

at cg.b(TcpConnection.java:451)

at iv.d(NetServerHandler.java:82)

at iw.b(NetworkListenThread.java:55)

at ht.b(SourceFile:30)

at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:691)

at ho.r(DedicatedServer.java:252)

at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:587)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:494)

at fy.run(SourceFile:856)

 

Where "player" is my username or anyone elses username

[Command blocks]

I'm running a FML 6.3 server, but when I use command blocks to set my spawnpoint and then get killed or use /kill, it gives me an internal server error as soon as I hit the respawn button then disconnects me from the server. If I relog and click respawn, same thing happens. The only fix I found was to create a new world, but that's not really a fix. Any help?