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What is this? :S

Error loading file C:\server\l2j\data\stats\skills\0100-0199.xml
org.xml.sax.SAXParseException: The element type "skill" must be terminated by th
e matching end-tag "</skill>".
        at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(Unknown So
urce)
        at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(Unk
nown Source)
        at javax.xml.parsers.DocumentBuilder.parse(Unknown Source)
        at net.sf.l2j.gameserver.skills.DocumentBase.parse(DocumentBase.java:71)

        at net.sf.l2j.gameserver.skills.SkillsEngine.loadSkills(SkillsEngine.jav
a:92)
        at net.sf.l2j.gameserver.skills.SkillsEngine.loadAllSkills(SkillsEngine.
java:101)
        at net.sf.l2j.gameserver.SkillTable.<init>(SkillTable.java:51)
        at net.sf.l2j.gameserver.SkillTable.getInstance(SkillTable.java:43)
        at net.sf.l2j.gameserver.NpcTable.RestoreNpcData(NpcTable.java:124)
        at net.sf.l2j.gameserver.NpcTable.<init>(NpcTable.java:65)
        at net.sf.l2j.gameserver.NpcTable.getInstance(NpcTable.java:56)
        at net.sf.l2j.gameserver.lib.jbf.words.L2j_spawn$spawn.exec(L2j_spawn.ja
va:38)
        at net.sf.l2j.gameserver.lib.jbf.Word.exec(Word.java:49)
        at net.sf.l2j.gameserver.lib.JBForth.do_word(JBForth.java:401)
        at net.sf.l2j.gameserver.lib.JBForth.do_code(JBForth.java:247)
        at net.sf.l2j.gameserver.lib.JBForth.exec(JBForth.java:160)
        at net.sf.l2j.gameserver.lib.JBForth.execp(JBForth.java:179)
        at net.sf.l2j.gameserver.lib.jbf.words.Lists$do_list.exec(Lists.java:205
)
        at net.sf.l2j.gameserver.lib.jbf.Word.exec(Word.java:49)
        at net.sf.l2j.gameserver.lib.jbf.Word.exec(Word.java:49)
        at net.sf.l2j.gameserver.lib.JBForth.do_word(JBForth.java:401)
        at net.sf.l2j.gameserver.lib.JBForth.do_code(JBForth.java:247)
        at net.sf.l2j.gameserver.lib.JBForth.exec(JBForth.java:160)
        at net.sf.l2j.gameserver.lib.JBForth.execp(JBForth.java:179)
        at net.sf.l2j.gameserver.lib.jbf.words.FileSystem$included.exec(FileSyst
em.java:48)
        at net.sf.l2j.gameserver.lib.JBForth.do_word(JBForth.java:401)
        at net.sf.l2j.gameserver.lib.JBForth.do_code(JBForth.java:247)
        at net.sf.l2j.gameserver.lib.JBForth.exec(JBForth.java:160)
        at net.sf.l2j.gameserver.lib.JBForth.do_code(JBForth.java:319)
        at net.sf.l2j.gameserver.lib.JBForth.exec(JBForth.java:160)
        at net.sf.l2j.gameserver.lib.JBForth.execp(JBForth.java:179)
        at net.sf.l2j.gameserver.lib.jbf.words.FileSystem$included.exec(FileSyst
em.java:48)
        at net.sf.l2j.gameserver.lib.JBForth.do_word(JBForth.java:401)
        at net.sf.l2j.gameserver.lib.JBForth.do_code(JBForth.java:247)
        at net.sf.l2j.gameserver.lib.JBForth.exec(JBForth.java:160)
        at net.sf.l2j.gameserver.lib.JBForth.do_code(JBForth.java:310)
        at net.sf.l2j.gameserver.lib.JBForth.exec(JBForth.java:160)
        at net.sf.l2j.gameserver.lib.JBForth.execp(JBForth.java:179)
        at net.sf.l2j.gameserver.lib.jbf.words.FileSystem$included.exec(FileSyst
em.java:48)
        at net.sf.l2j.gameserver.lib.JBForth.do_word(JBForth.java:401)
        at net.sf.l2j.gameserver.lib.JBForth.do_code(JBForth.java:247)
        at net.sf.l2j.gameserver.lib.JBForth.exec(JBForth.java:160)
        at net.sf.l2j.gameserver.lib.JBForth.do_code(JBForth.java:319)
        at net.sf.l2j.gameserver.lib.JBForth.exec(JBForth.java:160)
        at net.sf.l2j.gameserver.lib.JBForth.execp(JBForth.java:179)
        at net.sf.l2j.gameserver.lib.JBForth.reload(JBForth.java:135)
        at net.sf.l2j.gameserver.lib.JBForth.<init>(JBForth.java:85)
        at net.sf.l2j.gameserver.GameServer.<init>(GameServer.java:238)
        at net.sf.l2j.Server.main(Server.java:70)