TNS-12518 with connections to 12c Database using the 12c Listener
(Doc ID 1989707.1)
Last updated on JANUARY 01, 2020
Applies to:Oracle Net Services - Version 188.8.131.52 and later
Information in this document applies to any platform.
When making a connection to the 12c Database via the 12c Listener, this may fail persistently (all the time) with TNS-12518
This may be a new installation or there may have been changes made to the Listener.ora file (specifically, the SID_LIST section)
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