DB Error: syntax error
SELECT art_id, art_filename, art_type, art_orig, max(ari_pubdate) AS pubdate
                 FROM article, artinstance, articles_author
                 WHERE (art_id = ari_article) and (art_id=ara_article) and (ara_author=)
                 GROUP BY art_id
                 ORDER BY pubdate DESC
                  [nativecode=1064 ** You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')
                 GROUP BY art_id
                 ORDER BY pubdate DESC' at line 3]