Important Update: R12.2 AD and TXK Delta4 consolidated Updates are NOW AVAILABLE....
The roll-up patches are now available:
Patch 18491990 :R12.AD.C
Patch 18497540:R12.TXK.C
Customers should follow the instructions in Applying R12.AD.C.Delta.4 and R12.TXK.C.Delta.4 Release Update Packs (Doc ID 1617461.1) carefully.
There is also an update to the Known Issues section in Oracle E-Business Suite Technology Stack and Applications DBA Release Notes for
R12.TXK.C.Delta.4 and R12.AD.C.Delta.4 (Doc ID 1624423.1).