How big is your database? If your database is not very big (not more than 20GB, in which you have to use compress utility and named pipe to limit your dump file size), See my response for cravi posting 'upgrade' on 12/21/00 using exp/imp. Its upgrade and it should work unless you have specific reasons to 'MIGRATE', not upgrade. Make sure there are no datatypes changed for your application from 815 to 817, in case exp/imp doesn't work. I don't think datatype changed from 815 to 817. Not sure, check it up with 817 release documentation.