Hi, i have a one-to-many relation in which the parent has a bag of children with cascade="all".

Supposing that i have a parent object "parentObj", when i call session.Delete(parentObj) it is supposed to delete all childs too?

That's what i think that makes sense, but when i try to do this, i get a "The DELETE statement conflicted with the REFERENCE constraint" exception.

Is cascade="delete" specified in the many-to-one mapping from the children to the parent? This thread says that cascades apply to the other side of the association.

Can you post the code between the session open and close that throws this exception? If you are doing a bidrectional association you'll not only need to do a parentObj.Children.Remove(childObj) but also a childObj.Parent =null. Be sure, too, that you have inverse="true" in the appropriate place.

MIKE