Hi Andrew, I think it's the best to ask your local CPWR account manager for support. Officially, Uniface 7 is out of support a long long time ago. And ORACLE has the tendency to be not always upward compatible as well. Using SQL*Net as middleware, you may be able to get aceptable chains of versions, because "older" clients can connect to "newer" oracle databases bridging the gap. And the easiest: just give it a test with your application.