How to find the issue?

[MrTitan]

How to find the item with the issue .. THERE IS NO INFO!

[18:59:49]  WARN ItemParser: Fail create item: null
java.lang.IllegalArgumentException: Integer value required, but found: null!
        at l2.commons.collections.MultiValueSet.getInteger(Unknown Source)
        at l2.gameserver.templates.item.ItemTemplate.<init>(Unknown Source)
        at l2.gameserver.templates.item.EtcItemTemplate.<init>(Unknown Source)
        at l2.gameserver.data.xml.parser.ItemParser.readData(Unknown Source)
        at l2.commons.data.xml.AbstractParser.parseDocument(Unknown Source)
        at l2.commons.data.xml.AbstractDirParser.parse(Unknown Source)
        at l2.commons.data.xml.AbstractParser.load(Unknown Source)
        at l2.gameserver.data.xml.Parsers.parseAll(Unknown Source)
        at l2.gameserver.GameServer.<init>(Unknown Source)
        at l2.gameserver.GameServer.main(Unknown Source)
[18:59:49]  WARN ItemParser: Fail create item: null
java.lang.IllegalArgumentException: Integer value required, but found: null!
        at l2.commons.collections.MultiValueSet.getInteger(Unknown Source)
        at l2.gameserver.templates.item.ItemTemplate.<init>(Unknown Source)
        at l2.gameserver.templates.item.EtcItemTemplate.<init>(Unknown Source)
        at l2.gameserver.data.xml.parser.ItemParser.readData(Unknown Source)
        at l2.commons.data.xml.AbstractParser.parseDocument(Unknown Source)
        at l2.commons.data.xml.AbstractDirParser.parse(Unknown Source)
        at l2.commons.data.xml.AbstractParser.load(Unknown Source)
        at l2.gameserver.data.xml.Parsers.parseAll(Unknown Source)
        at l2.gameserver.GameServer.<init>(Unknown Source)
        at l2.gameserver.GameServer.main(Unknown Source)

 

[Deazer]

item: null
No ID, no any else

The code refers to an item that is null

 

[MrTitan]

item: null
No ID, no any else

The code refers to an item that is null

Yes I understand that but there is no trace or any info to see which ID or item is ...

 

[FORD]

Yes I understand that but there is no trace or any info to see which ID or item is ...

Here you are again doing the same thing...
Your question looks like this
"Hello everyone, my car won't start. What's the problem? The battery is charged, but the car won't start"

what exactly are you doing to cause this error to appear?
When does it happen?

 

[Arca]

I suggest making backup before applying any new updates/modification, so in the event error like this u can mitigate the issue easily or rollback to previous state