After changing the DB2 function level to V12R1M500 from V12R1M100, the SYSVIEW -MVS monitor's Db2 metrics option (via IDB2 and XNET)
fails with 'DB20004E DSQPARMS failed - rc 197 rsn 5F
The Db2 Database was still in maintenance mode.
Release : 20.0
Component : CA SYSVIEW Performance Management Option for DB2 for z/OS
The '5F' error means 'DB2 inactive or in maint mode.' The issue was resolved by bringing the DataBase out of maintenance mode, a necessary step after migrating to V12R1M500.