>I append a record to both primaty and secondary tables, both records get default values in the key fields for relation; edit not key fields in both and append a new record to the secondary table. Doing this make the RI Trigger fail when I set the buffer mode of the secondary table cursor to Optimistic Row. Every thing works fine if I use the table buffer, but each record of the secondary table has certain independence from the others in the secondary, so I prefer to evaluate them in a row basis.
>I hope someone could help me on this


Make sure blank values are not being saved. Blank values in an index can cause failure. They could be made blank before you realize it & have a chance to edit them.

HTH
Tom