The format of the DBNAME directory has changed. As a result, you must modify the DBNAME directory source file member (ARISDIRD), and create a new phase. See V7R1 and V6R1 Incompatibilities and Setting Up the DBNAME Directory, for more information.
When running VSE/ESA 2.5, DB2 Server for VSE is key-enabled. For information on setting up the DB2 key, see the DB2 Server for VSE Program Directory.