[Zope] shared instance error

I have the following error occasionally occur <Shared.DC.ZRDB.RDB.DatabaseResults instance at b58540> The above is the only error in the traceback. Using NS 4.5, WinNT 4, and 1.11pr1 with Zserver. ------- Regards, Graham Chiu gchiu<at>compkarori.co.nz