Connect Thru Listener for NEWLY Converted RAC DB Failing ......Basic Qs

Folks

Manually converted a Database from NON-RAC to RAC (2 instances) & Changed the "tnsnames.ora" file suitably.

Yet connect VIA the Listener to this Database is failing.

ERROR: ORA-12521: TNS:listener does not currently know of instance requested in

connect descriptor

NOTE - Connect to another Sample Database (TSTRAC) Created thru the "DBCA" Tool on the Same RAC Nodes is successful.

Qs Is registering of this RAC database and its instance-to-node mapping using SRVCTL needed? If so, How?

Qs Is Manually Change to some Other files also needed (Other than tnsnames.ora)?

Thanks indeed

FAILING Database PNBRAC related services versus TSTRAC (Working Database) related services are shown below:-

$ lsnrctl stat

Service "PNBRAC.ad.infosys.com" has 1 instance(s).

  Instance "PNBRAC", status READY, has 1 handler(s) for this service...

Service "PNBRACXDB.ad.infosys.com" has 1 instance(s).

  Instance "PNBRAC", status READY, has 1 handler(s) for this service...

Service "PNBRAC_XPT.ad.infosys.com" has 1 instance(s).

  Instance "PNBRAC", status READY, has 1 handler(s) for this service...

Service "TSTRAC.ad.infosys.com" has 2 instance(s).

  Instance "TSTRAC1", status READY, has 2 handler(s) for this service...

  Instance "TSTRAC2", status READY, has 1 handler(s) for this service...

Service "TSTRACXDB.ad.infosys.com" has 2 instance(s).

  Instance "TSTRAC1", status READY, has 1 handler(s) for this service...

  Instance "TSTRAC2", status READY, has 1 handler(s) for this service...

Service "TSTRAC_XPT.ad.infosys.com" has 2 instance(s).

  Instance "TSTRAC1", status READY, has 2 handler(s) for this service...

  Instance "TSTRAC2", status READY, has 1 handler(s) for this service...

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