java.util.NoSuchElementException in ArtisitTitle check

java.util.NoSuchElementException
at java.util.LinkedHashMap$LinkedHashIterator.nextNode(Unknown Source)
at java.util.LinkedHashMap$LinkedEntryIterator.next(Unknown Source)
at java.util.LinkedHashMap$LinkedEntryIterator.next(Unknown Source)
at com.jthink.jaikoz.manipulate.scoring.Scorer.isGoodArtistOrTitleMatch(Scorer.java:1188)
at com.jthink.jaikoz.manipulate.musicbrainzhelper.MusicBrainzScorer.calculateReleaseScoreForSingleSong(MusicBrainzScorer.java:332)
at com.jthink.jaikoz.manipulate.musicbrainzhelper.MusicBrainzScorer.calculateReleaseScoresForSingleSong(MusicBrainzScorer.java:635)
at com.jthink.jaikoz.manipulate.musicbrainzhelper.MusicBrainzScorer.calculateBestReleaseScoreForSingleSong(MusicBrainzScorer.java:695)
at com.jthink.jaikoz.manipulate.MusicBrainzSingleSongMatcher.scoreAndUpdateWithBestMatch(MusicBrainzSingleSongMatcher.java:277)
at com.jthink.jaikoz.manipulate.CorrectFromMusicBrainzWorker.singleSongMatch(CorrectFromMusicBrainzWorker.java:613)
at com.jthink.jaikoz.manipulate.CorrectFromMusicBrainzWorker.doMatching(CorrectFromMusicBrainzWorker.java:121)
at com.jthink.jaikoz.manipulate.CorrectFromMusicBrainzWorker.call(CorrectFromMusicBrainzWorker.java:242)
at com.jthink.jaikoz.manipulate.CorrectFromMusicBrainzWorker.call(CorrectFromMusicBrainzWorker.java:46)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)