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error handling client message [C] 72 RequestCrystallizeItem
java.lang.NullPointerException
        at net.sf.l2j.gameserver.clientpackets.RequestCrystallizeItem.runImpl(Re
questCrystallizeItem.java:73)
        at net.sf.l2j.gameserver.clientpackets.ClientBasePacket.run(ClientBasePa
cket.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)