ORA-12523 Errors Connecting After Upgrading A Second Database To 11gr2
Last updated on APRIL 13, 2017
Applies to:Oracle Net Services - Version: 220.127.116.11
Information in this document applies to any platform.
After upgrading a second database instance from 10gR2 to 11gR2 (18.104.22.168) on the same machine, unable to connect to the original 11gR2 database instance that was previously working fine.
ORA-12523: TNS:listener could not find instance appropriate for the client after 11g upgrade
Sign In with your My Oracle Support account
Don't have a My Oracle Support account? Click to get started
My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms