java.lang.NullPointerException
        at net.sf.l2j.gameserver.serverpackets.MultiSellList.writeImpl(MultiSell
List.java:77)
        at net.sf.l2j.gameserver.serverpackets.ServerBasePacket.write(ServerBase
Packet.java:130)
        at net.sf.l2j.gameserver.SelectorThread.pack(SelectorThread.java:508)
        at net.sf.l2j.gameserver.SelectorThread.processOutboudQueue(SelectorThre
ad.java:608)
        at net.sf.l2j.gameserver.SelectorThread.run(SelectorThread.java:233)