L2J Server

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L2J Revision 4056:
L2JDP Revision 7238:

Failed running: [C] A7 MultiSellChoose - L2J Server Version: 4056M - DP Revision
: 7238
java.lang.NullPointerException
at com.l2jserver.gameserver.network.clientpackets.MultiSellChoose.doExch
ange(MultiSellChoose.java:491)
at com.l2jserver.gameserver.network.clientpackets.MultiSellChoose.runImp
l(MultiSellChoose.java:126)
at com.l2jserver.gameserver.network.clientpackets.L2GameClientPacket.run
(L2GameClientPacket.java:92)
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)
**************************************************************************************************
At purchase items (armors and etc) through communityboard It occurs....
Changes in multisellchoose.java:

/*if (!player.isGM() && (target == null
|| !(target instanceof L2Npc)
|| !list.checkNpcId(((L2Npc)target).getNpcId())
|| !((L2Npc)target).canInteract(player)))
return;*/

/*if (merchant == null)
return;*/

if (merchant != null && merchant.getIsInTown() && merchant.getCastle().getOwnerId() > 0)....... Specifies in it an error

HELP me pls))

its not clever to remove exploit protection...