L2J Server

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L2J Revision Number:5828M
L2JDP Revision Number:9472M

Log error messages:

febr. 27, 2013 8:04:34 DU com.l2jserver.gameserver.model.effects.EffectTemplate getEffect
WARNING: Error creating new instance of Class class handlers.effecthandlers.Buff Exception was: null
java.lang.NullPointerException
at com.l2jserver.gameserver.model.effects.L2Effect.<init>(L2Effect.java:161)
at handlers.effecthandlers.Buff.<init>(Buff.java:33)
at sun.reflect.GeneratedConstructorAccessor72.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
at com.l2jserver.gameserver.model.effects.EffectTemplate.getEffect(EffectTemplate.java:110)
at com.l2jserver.gameserver.model.skills.L2Skill.getEffects(L2Skill.java:1736)
at handlers.skillhandlers.Continuous.useSkill(Continuous.java:175)
at com.l2jserver.gameserver.model.actor.L2Character.callSkill(L2Character.java:6992)
at com.l2jserver.gameserver.model.actor.L2Character.onMagicHitTimer(L2Character.java:6662)
at com.l2jserver.gameserver.model.actor.L2Character.onMagicLaunchedTimer(L2Character.java:6489)
at com.l2jserver.gameserver.model.actor.L2Character.beginCast(L2Character.java:2059)
at com.l2jserver.gameserver.model.actor.L2Character.beginCast(L2Character.java:1730)
at com.l2jserver.gameserver.model.actor.L2Character.doSimultaneousCast(L2Character.java:1592)
at handlers.itemhandlers.ItemSkillsTemplate.useItem(ItemSkillsTemplate.java:158)
at handlers.itemhandlers.ItemSkills.useItem(ItemSkills.java:40)
at com.l2jserver.gameserver.model.actor.instance.L2PcInstance.doPickupItem(L2PcInstance.java:5190)
at com.l2jserver.gameserver.model.actor.instance.L2PcInstance$AIAccessor.doPickupItem(L2PcInstance.java:385)
at com.l2jserver.gameserver.ai.L2PlayerAI.thinkPickUp(L2PlayerAI.java:313)
at com.l2jserver.gameserver.ai.L2PlayerAI.onEvtThink(L2PlayerAI.java:359)
at com.l2jserver.gameserver.ai.L2CharacterAI.onEvtArrived(L2CharacterAI.java:738)
at com.l2jserver.gameserver.ai.AbstractAI.notifyEvent(AbstractAI.java:393)
at com.l2jserver.gameserver.ai.AbstractAI.notifyEvent(AbstractAI.java:320)
at com.l2jserver.gameserver.GameTimeController$MovingObjectArrived.run(GameTimeController.java:263)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:722)

you have modified files, update your core correctly. you don't have 5812 & 5813 changeset

this is herb problem and they have fix it before 2-3 days so you need core update!