Full CXX report shows "CONTROL AREA DIRECTORY CXX VERSION - 14.0" after active Datacom15.1 upgrade.
Also, these messages are found in the MUF log:
DB00915I - CXX DBID 15 DDD-DATABASE DEFINITION VERSION 14.0 CHANGE LEVEL 0
DB00915I - CXX DBID 2 DATA-DICT DEFINITION VERSION 14.0 CHANGE LEVEL 0
Release: 15.1
Component: Datacom/AD
Component: Datacom/DB
This is as intended and is correct. Version 14.0 CXX is compatible with 15.1.
If you see version 14.0 for the DD/DDD resources, you need to run BDACTDD1 and BDACTDD2 (for Datacom/DB) or AXACTDD1 and AXACTDD2 (for Datacom/AD) after you are sure the new version is working correctly and the fallback to 14.0 is not necessary.
For more information about the AXACTDD1 and DD2 see article 273617 - What are Datacom/AD upgrade jobs AXACTDD1 and AXACTDD2?.