java.lang.NullPointerException
	at net.sf.l2j.gameserver.skills.l2skills.L2SkillSummon.useSkill(L2SkillSummon.java:161)
	at net.sf.l2j.gameserver.model.L2Character.callSkill(L2Character.java:5109)
	at net.sf.l2j.gameserver.model.L2Character.onMagicUseTimer(L2Character.java:4848)
	at net.sf.l2j.gameserver.model.L2Character$MagicUseTask.run(L2Character.java:1675)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:417)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269)
	at java.util.concurrent.FutureTask.run(FutureTask.java:123)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:65)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:168)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
	at java.lang.Thread.run(Thread.java:595)

java.lang.IllegalArgumentException
	at java.util.concurrent.ScheduledThreadPoolExecutor.scheduleAtFixedRate(ScheduledThreadPoolExecutor.java:316)
	at net.sf.l2j.gameserver.ThreadPoolManager.scheduleGeneralAtFixedRate(ThreadPoolManager.java:153)
	at net.sf.l2j.gameserver.model.AutoChatHandler$AutoChatInstance$AutoChatDefinition.setActive(AutoChatHandler.java:640)
	at net.sf.l2j.gameserver.model.AutoChatHandler$AutoChatInstance$AutoChatDefinition.<init>(AutoChatHandler.java:588)
	at net.sf.l2j.gameserver.model.AutoChatHandler$AutoChatInstance.addChatDefinition(AutoChatHandler.java:348)
	at net.sf.l2j.gameserver.model.AutoChatHandler$AutoChatInstance.addChatDefinition(AutoChatHandler.java:330)
	at net.sf.l2j.gameserver.model.AutoChatHandler.registerChat(AutoChatHandler.java:178)
	at net.sf.l2j.gameserver.model.AutoChatHandler.registerChat(AutoChatHandler.java:165)
	at net.sf.l2j.gameserver.model.quest.QuestPcSpawn.addChatTask(QuestPcSpawn.java:353)
	at net.sf.l2j.gameserver.model.quest.QuestPcSpawn.addSpawn(QuestPcSpawn.java:233)
	at net.sf.l2j.gameserver.model.quest.QuestPcSpawn.addSpawn(QuestPcSpawn.java:220)
	at net.sf.l2j.gameserver.instancemanager.MercTicketManager.addTicket(MercTicketManager.java:313)
	at net.sf.l2j.gameserver.handler.itemhandlers.MercTicket.useItem(MercTicket.java:99)
	at net.sf.l2j.gameserver.clientpackets.UseItem.runImpl(UseItem.java:256)
	at net.sf.l2j.gameserver.clientpackets.ClientBasePacket.run(ClientBasePacket.java:59)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
	at java.lang.Thread.run(Thread.java:595)