Exchanger NPC

[FapFap 13]

I made an Exchanger NPC and im having such error at lua_err.txt

[06-14 17:30:43]resource/script/MisSdk/NpcSdk.lua:173: attempt to index local `exchangeData' (a nil value)

Exchanger NPC Script:

function exch_1 ()

	Talk( 1, "Exchanger: Hi, welcome! How can I help you?" )
	Text( 1, "Exchange Item", SendExchangeXData)
	Text( 1, "Nothing...",CloseTalk )

	InitExchangeX() 
	ExchangeDataX(	7505	,	300	,	7591	,	1	,	1)
end 

NpcSdk.lua Function:

function SendExchangeXData( character, npc, exchangeData )
	local packet = GetPacket()
	WriteCmd( packet, CMD_MC_EXCHANGEDATA )
	local npcid = GetCharID( npc )
	WriteDword( packet, npcid )
	
	if exchangeData.count ~= nil then
		WriteWord( packet, exchangeData.count )
		
		for n = 1, exchangeData.count, 1 do
			WriteWord( packet, exchangeData.srcid[n] )
			WriteWord( packet, exchangeData.srcnum[n] )
			WriteWord( packet, exchangeData.tarid[n] )
			WriteWord( packet, exchangeData.tarnum[n] )
		end
	else
		WriteWord( packet, 0 )
	end
	
	SendPacket( character, packet );
end

Error shows at SystemNotice after clicking "Exchange Item"

Edited June 14, 2019 by FapFap

[Leba 12]

You have to add an appropriate ChangeItemList[] line in variable.lua too if I remember right.

[FapFap 13]

On 6/14/2019 at 8:03 PM, Leba said:

You have to add an appropriate ChangeItemList[] line in variable.lua too if I remember right.

I already did, but its showing the error that i posted here