My personal configuration: ZPoPyDA 2.0.7 Zope 2.4.0 Python 2.1.1 Debian/GNU Linux Another bug or is it only a bad dtml construction? Again from ZopeBook I see this Examples Sample usage: select * from employees <dtml-sqlgroup where> <dtml-sqltest salary op=gt type=float optional> <dtml-and> <dtml-sqltest first op=eq type=string multiple optional> <dtml-and> <dtml-sqltest last op=eq type=string multiple optional> </dtml-sqlgroup> (...) If salary is 50000 and last is Smith it renders: select * from employees where (salary > 50000.0 and last='Smith' ) Mmmm..., is ZPoPyDA supposse to do that? I don´t think so. My code: Arguments: id, name. SELECT * FROM Departments <dtml-sqlgroup where> <dtml-sqltest id op=eq type=int optional> <dtml-and> <dtml-sqltest name op=eq type=string optional> IT WORKS!!! with the fix by Jim Penny </dtml-sqlgroup> ORDER BY id My Query Result without blanks arguments, Zope renders... SELECT * FROM Departments where name = '' ORDER BY idDepartamento Ups! Is it my code or is it a new bug? I´m thinking about change to psicopg... Is it a good idea? Antonio Carrasco