Using: Zope Version (Zope 2.5.1 (source release, python 2.1, linux2), python 2.1.3, linux2) Python Version 2.1.3 (#1, Apr 22 2002, 16:16:34) [GCC 2.96 20000731 (Red Hat Linux 7.1 2.96-85)] In the catalog, I have a FieldIndex that contains an integer. I want to select all objects where that number is 0 or less. objs=Catalog(number_times_sent=0 ,number_times_sent_usage='range:max' ) However, this returns all items, regardless of the value of number_times_sent. If an object has number_times_sent to 2, and I do this call: objs= Catalog(number_times_sent=1 ,number_times_sent_usage='range:max' ) It works as expected, and that object isn't returned. Also, when number_times_sent is 0, the following does work. objs= Catalog(number_times_sent=0) Since I won't have a negative value, this does what I want. However, number_times_sent is variable, so it would be nice if 'range:max' worked for zero. Is there any logical explanation? Bug? Am I doing something wrong? Thanks, Mark