[09:36:34] [Server thread/INFO]: arnofrutos issued server command: /walls create 1
[09:36:34] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'walls' in plugin GWalls v2.1
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[Spigot.jar:git-Spigot-1487]
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:180) ~[Spigot.jar:git-Spigot-1487]
	at org.bukkit.craftbukkit.v1_7_R3.CraftServer.dispatchCommand(CraftServer.java:726) ~[Spigot.jar:git-Spigot-1487]
	at net.minecraft.server.v1_7_R3.PlayerConnection.handleCommand(PlayerConnection.java:999) [Spigot.jar:git-Spigot-1487]
	at net.minecraft.server.v1_7_R3.PlayerConnection.a(PlayerConnection.java:830) [Spigot.jar:git-Spigot-1487]
	at net.minecraft.server.v1_7_R3.PacketPlayInChat.a(PacketPlayInChat.java:28) [Spigot.jar:git-Spigot-1487]
	at net.minecraft.server.v1_7_R3.PacketPlayInChat.handle(PacketPlayInChat.java:65) [Spigot.jar:git-Spigot-1487]
	at net.minecraft.server.v1_7_R3.NetworkManager.a(NetworkManager.java:180) [Spigot.jar:git-Spigot-1487]
	at net.minecraft.server.v1_7_R3.ServerConnection.c(ServerConnection.java:81) [Spigot.jar:git-Spigot-1487]
	at net.minecraft.server.v1_7_R3.MinecraftServer.v(MinecraftServer.java:720) [Spigot.jar:git-Spigot-1487]
	at net.minecraft.server.v1_7_R3.DedicatedServer.v(DedicatedServer.java:283) [Spigot.jar:git-Spigot-1487]
	at net.minecraft.server.v1_7_R3.MinecraftServer.u(MinecraftServer.java:583) [Spigot.jar:git-Spigot-1487]
	at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:489) [Spigot.jar:git-Spigot-1487]
	at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:628) [Spigot.jar:git-Spigot-1487]
Caused by: java.lang.NullPointerException
	at me.the1gamers.minigames.GWalls.blockFileData.ArenaBlocksAndInfo.updateInfo(ArenaBlocksAndInfo.java:97) ~[?:?]
	at me.the1gamers.minigames.GWalls.blockFileData.ArenaBlocksAndInfo.<init>(ArenaBlocksAndInfo.java:51) ~[?:?]
	at me.the1gamers.minigames.GWalls.blockFileData.ArenaFileManager.saveToAFile(ArenaFileManager.java:31) ~[?:?]
	at me.the1gamers.minigames.GWalls.WallsCommand.onCommand(WallsCommand.java:119) ~[?:?]
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[Spigot.jar:git-Spigot-1487]
	... 13 more