Error page: /listInfo.php?nid=42

Error infos: 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 'and qf_self.id > '42' order by qf_self.id asc LIMIT 1' at line 1
Error sql: SELECT qf_self.id,qf_self.title FROM qf_self WHERE qf_self.pid= and qf_self.id > '42' order by qf_self.id asc LIMIT 1

Error page: /listInfo.php?nid=42

Error infos: 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 'and qf_self.id < '42' order by qf_self.id desc LIMIT 1' at line 1
Error sql: SELECT qf_self.id,qf_self.title FROM qf_self WHERE qf_self.pid= and qf_self.id < '42' order by qf_self.id desc LIMIT 1