For 12.1, AD and TXK patchsets are not the same Delta version like they are on 12.2. It appears they are on AD Delta 8 and TXK Delta 3. In general, I only upgrade these products when forced by a patch readme that I need to apply.
Oracle E-Business Suite Applications DBA Readme, Release 12.1.3+ (R12.AD.B.Delta.8) (Doc ID 2166227.1)
It is important to be on the same AD and TXK Delta RUP codelevel. You must therefore apply both AD & TKX to same , not just one of them.
Release Notes for R12.AD.C.Delta.9 and R12.TXK.C.Delta.9 (Doc ID 2233485.1)
Hope this helps!
I think the OP was asking about 12.1 AD.B/TXK.B.
Yes, for 12.2, they should be the same levels.
Thanks Michael and Kanda
Yes I am asking for 12.1.3 , but 12.2 is a welcome added information.
How do I know if I my AD & TXK is latest?
For 12.1, I just search My Oracle Support for AD.B.Delta, and then TXK.B.Delta and see what comes up. You can also keep an eye on Steven Chan's EBS Technology Blog:
There is shows 12.1.3+ RPC 5 is the latest for 12.1. That patch has specific AD and TXK requirements which should get you close to current/latest.
What is RPC5? is it similar to RUP? Is it ok to apply it on our 12.1.1 instance? Does it include 12.1.3 updates?