java.lang.ClassCastException: net.sf.l2j.gameserver.model.L2SummonInstance
        at net.sf.l2j.gameserver.model.L2Party.distributeXpAndSp(L2Party.java:50
0)
        at net.sf.l2j.gameserver.model.L2Attackable.calculateRewards(L2Attackabl
e.java:334)
        at net.sf.l2j.gameserver.model.L2Attackable.doDie(L2Attackable.java:191)

        at net.sf.l2j.gameserver.model.L2Character.reduceCurrentHp(L2Character.j
ava:2487)
        at net.sf.l2j.gameserver.model.L2Attackable.reduceCurrentHp(L2Attackable
.java:187)
        at net.sf.l2j.gameserver.model.L2Attackable.reduceCurrentHp(L2Attackable
.java:170)
        at net.sf.l2j.gameserver.handler.skillhandlers.Mdam.useSkill(Mdam.java:9
5)
        at net.sf.l2j.gameserver.model.L2Character.callSkill(L2Character.java:44
47)
        at net.sf.l2j.gameserver.model.L2Character.onMagicUseTimer(L2Character.j
ava:4273)
        at net.sf.l2j.gameserver.model.L2Character$MagicUseTask.run(L2Character.
java:253)
        at java.util.concurrent.Executors$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)