[HELP] Bad argument @ 'getPlayerName' Need Help

[daffabahy]

  triggerClientEvent ( "onRollMessageStart", getRootElement(),"#FFFFFF"..getPlayerName(source).." #FFFFFFwas killed by "..(getPlayerName(killer) or "unknown")..".",0,22,255, "died") 
  destroyElement(getElementData(source, "playerCol")) 
  setTimer(spawnDayZPlayer, 5000, 1, source) 
end 
addEvent("kilLDayZPlayer", true) 
addEventHandler("kilLDayZPlayer", getRootElement(), kilLDayZPlayer) 

I have a mta dayz server, but i have small problem too. can you help fix this script ?

[2016-02-13 06:14:38] WARNING: [DayZ-MTA]/DayZ/spawn.lua:672: Bad argument @ 'getPlayerName' [Expected element at argument 1, got boolean] 

[SpecT]

Show the function that triggers "kilLDayZPlayer".

[daffabahy]

setTimer(checkBuggedAccount, 90000, 0) 
function notifyAboutExplosion2() 
  for i, player in pairs(getVehicleOccupants(source)) do 
    triggerEvent("kilLDayZPlayer", player) 
  end 
end 
addEventHandler("onVehicleExplode", getRootElement(), notifyAboutExplosion2) 
function destroyDeadPlayer(ped, pedCol) 
  destroyElement(ped) 
  destroyElement(pedCol) 
end 
function kilLDayZPlayer(killer, headshot, weapon) 
  

This ? if not, i dont know where exactly.

[daffabahy]

Help pls

[Tomas]

  
function notifyAboutExplosion2() 
  for i, player in pairs(getVehicleOccupants(source)) do 
    triggerEvent("kilLDayZPlayer", player, false, false, false) 
  end 
end 
  

  
 triggerClientEvent ( "onRollMessageStart", getRootElement(),"#FFFFFF"..getPlayerName(source).." #FFFFFFwas killed by ".. ( isElement(killer) and getPlayerName(killer) or "unknown") ..".",0,22,255, "died") 
  

[daffabahy]

Thanks, i'll try it soon.