                     * Se ha producido un error 
Database::query (141):
SELECT c.id,c.autor, c.idcritica,c.idrefcomentario, c.comentario,c.tipo,c.fechahora,c.aprobado,
			        u.name,u.apellidos, u.url_img, u.descubrimientos, (u.descubrimientos + u.checksgood + u.checksbad) userrank, (u.checksgood + u.checksbad) votosfama, tipo
			        FROM comentarios c,users u
					WHERE c.autor = u.id and c.idcritica =  and (tipo='comentario' or tipo='pregunta') and borrado='F' and aprobado='T' order by c.id asc

Fatal error: Call to a member function fetchAll() on a non-object in /var/www/virtual/geocriticas.com/application/controllers/ComentariosController.php on line 19