what refers to an object

[Torsten Gallmeister]

Hallo,

I have a problem with debugging of my app.
I'm programming a ZOPE-Product. When Zope starts it is unpickling some
Objects "A". I never wanted to store the Objects in the DB. May be it was a
prior mistake, that some Objects "B" stored in the DB have a reference to
some Objects "A".
Is there any way to find out what referes to the "A"-Objects to delete them?
Tank's for any help,
                                Torsten.