Bukkit

Heres what happens:

> [00:35:30 INFO]: TomDudeGamerYT issued server command: /pp create south lel.txt 300

> [00:35:30 WARN]: java.lang.NullPointerException

> [00:35:30 WARN]: at me.zombie_striker.pixelprinter.PixelPrinter.createImage(PixelPrinter.java:946)

> [00:35:30 WARN]: at me.zombie_striker.pixelprinter.PixelPrinter.onCommand(PixelPrinter.java:889)

> [00:35:30 WARN]: at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)

> [00:35:30 WARN]: at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141)

> [00:35:30 WARN]: at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:641)

> [00:35:30 WARN]: at net.minecraft.server.v1_8_R3.PlayerConnection.handleCommand(PlayerConnection.java:1162)

> [00:35:30 WARN]: at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:997)

> [00:35:30 WARN]: at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:45)

> [00:35:30 WARN]: at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:1)

> [00:35:30 WARN]: at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13)

> [00:35:30 WARN]: at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)

> [00:35:30 WARN]: at java.util.concurrent.FutureTask.run(FutureTask.java:266)

> [00:35:30 WARN]: at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44)

> [00:35:30 WARN]: at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:715)

> [00:35:30 WARN]: at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374)

> [00:35:30 WARN]: at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654)

> [00:35:30 WARN]: at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557)

> [00:35:30 WARN]: at java.lang.Thread.run(Thread.java:748)

> [00:35:31 INFO]: TomDudeGamerYT issued server command: /save-all

> [00:35:31 INFO]: [TomDudeGamerYT: Saved the world]