Thank you, my customer is using the PROIV 4.0 for Unix, we'll have some problem when migrating to 4.6 for linux?
As Richard said, PROIV will be able to help but you may be charged if you are off your support contract. Support for Version 4.0 was discontinued in 1996, but version 5.5 will run 4.0 and 4.6 object code without issue. If you are moving to a new server YOU WILL DEFINITELY NEED NEW KEYS. This is no different than if you were moving Oracle to a new server. Good luck.