error handling client message [C] 38 Say2
java.lang.NoSuchMethodError: net.sf.l2j.gameserver.model.L2PcInstance.getKnownPl
ayers()Lnet/sf/l2j/util/L2ObjectHashSet;
        at net.sf.l2j.gameserver.clientpackets.Say2.runImpl(Say2.java:147)
        at net.sf.l2j.gameserver.clientpackets.ClientBasePacket.run(ClientBasePacket.java:56)
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
        at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
        at java.util.concurrent.FutureTask.run(Unknown Source)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(Unknown Source)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)



java.lang.NoSuchMethodError: net.sf.l2j.gameserver.model.L2NpcInstance.getKnownPlayers()Lnet/sf/l2j/util/L2ObjectHashSet;
        at net.sf.l2j.gameserver.model.L2NpcInstance.updateAbnormalEffect(L2NpcInstance.java:131)
        at net.sf.l2j.gameserver.model.L2Character.stopStunning(L2Character.java:740)
        at net.sf.l2j.gameserver.model.L2Character.reduceCurrentHp(L2Character.java:1526)
        at net.sf.l2j.gameserver.model.L2Attackable.reduceCurrentHp(L2Attackable.java:163)
        at net.sf.l2j.gameserver.model.L2Attackable.reduceCurrentHp(L2Attackable.java:153)
        at net.sf.l2j.gameserver.model.L2Character.onHitTimer(L2Character.java:2268)
        at net.sf.l2j.gameserver.model.L2PcInstance.onHitTimer(L2PcInstance.java:1202)
        at net.sf.l2j.gameserver.model.L2Character$HitTask.run(L2Character.java:168)
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
        at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
        at java.util.concurrent.FutureTask.run(Unknown Source)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(Unknown Source)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)

java.lang.reflect.InvocationTargetException
        at sun.reflect.GeneratedConstructorAccessor25.newInstance(Unknown Source)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
        at java.lang.reflect.Constructor.newInstance(Unknown Source)
        at net.sf.l2j.gameserver.skills.EffectTemplate.getEffect(EffectTemplate.java:71)
        at net.sf.l2j.gameserver.model.L2Skill.getEffects(L2Skill.java:1067)
        at net.sf.l2j.gameserver.handler.skillhandlers.Pdam.useSkill(Pdam.java:94)
        at net.sf.l2j.gameserver.model.L2Character.callSkill(L2Character.java:2756)
        at net.sf.l2j.gameserver.model.L2Character.onMagicUseTimer(L2Character.java:2647)
        at net.sf.l2j.gameserver.model.L2Character$MagicUseTask.run(L2Character.java:218)
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
        at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
        at java.util.concurrent.FutureTask.run(Unknown Source)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(Unknown Source)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NoSuchMethodError: net.sf.l2j.gameserver.model.L2NpcInstance.getKnownPlayers()Lnet/sf/l2j/util/L2ObjectHashSet;
        at net.sf.l2j.gameserver.model.L2NpcInstance.updateAbnormalEffect(L2NpcInstance.java:131)
        at net.sf.l2j.gameserver.model.L2Character.startStunning(L2Character.java:697)
        at net.sf.l2j.gameserver.skills.EffectStun.onStart(EffectStun.java:43)
        at net.sf.l2j.gameserver.model.L2Effect.scheduleEffect(L2Effect.java:234)
        at net.sf.l2j.gameserver.model.L2Effect.<init>(L2Effect.java:144)
        at net.sf.l2j.gameserver.skills.EffectStun.<init>(EffectStun.java:33)
        ... 17 more