java.lang.IllegalStateException
at net.sf.l2j.util.L2ObjectHashSet.remove(L2ObjectHashSet.java:223)
at net.sf.l2j.gameserver.model.L2Character.removeKnownObject(L2Character.java:2990)
at net.sf.l2j.gameserver.model.L2World.removeVisibleObject(L2World.java:452)
at net.sf.l2j.gameserver.model.L2Object.decayMe(L2Object.java:436)
at net.sf.l2j.gameserver.model.L2Character.onDecay(L2Character.java:724)
at net.sf.l2j.gameserver.model.L2NpcInstance.onDecay(L2NpcInstance.java:1157)
at net.sf.l2j.gameserver.model.L2Character$DecayTask.run(L2Character.java:396)
at java.util.concurrent.Executors$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)
NPC 1 class not found
java.lang.IllegalStateException
at net.sf.l2j.util.L2ObjectHashSet.put(L2ObjectHashSet.java:189)
at net.sf.l2j.gameserver.model.L2Character.addKnownObject(L2Character.java:2968)
at net.sf.l2j.gameserver.model.L2World.addVisibleObject(L2World.java:380)
at net.sf.l2j.gameserver.model.L2Object.spawnMe(L2Object.java:311)
at net.sf.l2j.gameserver.model.L2Spawn.doSpawn(L2Spawn.java:492)
at net.sf.l2j.gameserver.model.L2Spawn$SpawnTask.run(L2Spawn.java:121)
at java.util.concurrent.Executors$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)