I have an object that has a one-to-many relationship with another object. I'm receiving the following exception when trying to save the parent:

net.sf.hibernate.HibernateException: You may not dereference a collection with cascade="all-delete-orphan"

Before I post all of the mapping details, can anyone tell me generally what causes this? Maybe it'll ring a bell and I can run this down myself.

P.S. - When using cascade="all", saving works fine. The reason I switched to "all-delete-orphan" was because when I removed items from the collection, they were not being deleted from the database and after scanning the forum, this option seemed to work.

Thanks,
John

Hibernate keep deletion state inside the collection impl, so deferencing the collection with a new one, will lost this state.