Thread: [Compiling help eclipse] [Error running in eclipse] [server dc's when i kill some1]

sup guys as the title said i need help with eclipse
it doesnt seem to compile, ill edit a file and then terminate the server
then save it, then rerun the server and it doesnt work
and when i do save and restart i get this error in the console

Code:

Code:
java.lang.NullPointerException
	at com.rs.game.player.LocalPlayerUpdate.applyAppearanceMask(LocalPlayerUpdate.java:518)
	at com.rs.game.player.LocalPlayerUpdate.appendUpdateBlock(LocalPlayerUpdate.java:398)
	at com.rs.game.player.LocalPlayerUpdate.processLocalPlayers(LocalPlayerUpdate.java:252)
	at com.rs.game.player.LocalPlayerUpdate.createPacketAndProcess(LocalPlayerUpdate.java:540)
	at com.rs.net.encoders.WorldPacketsEncoder.sendLocalPlayersUpdate(WorldPacketsEncoder.java:811)
	at com.rs.cores.WorldProcessor.process(WorldProcessor.java:57)
	at com.rs.cores.PriorityProcessor.run(PriorityProcessor.java:13)

and also when i kill some1 in the wildy i dc and get this error

Code:

Code:
        at com.rs.game.player.PkRank.checkRank(PkRank.java:110)
        at com.rs.game.player.Player.increaseKillCount(Player.java:1258)
        at com.rs.game.player.Player$17.run(Player.java:1174)
        at com.rs.game.tasks.WorldTasksManager.processTasks(WorldTasksManager.ja
va:48)
        at com.rs.cores.WorldProcessor.process(WorldProcessor.java:34)
        at com.rs.cores.PriorityProcessor.run(PriorityProcessor.java:13)
java.lang.NullPointerException

That keeps repeating