I receive this error message whenever I attempt to create a domain from a custom type, but Google comes up short on explanations. A few mailing list messages touch on the subject, but nothing like the details on just where the limits lay or why they are as they are (or even if work is being done on this, and a new version might allow this someday). I was hoping to create a domain so that I could constrain the value of one of the elements dependent on the value of the other element(s). Can anyone shed some light on this? Thanks, John O. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general