ORLBKNOV4BLK, Region rrrr (dddd) has V4 format blocks. Database upgrade required. ONLINE ROLLBACK cannot continue
MUPIP Error: Issued by MUPIP ROLLBACK -ONLINE when it finds the region rrrr mapped to database file dddd contains V4 format blocks - online rollback does not support old format blocks.
Action: Upgrade the database to the current major version before attempting to use online rollback.
