Oracle® Database 11g / 12c / 18c error codes ORA-12229: TNS:Interchange has no more free connections

ORA-12229: TNS:Interchange has no more free connections

Oracle Error Code: ORA-12229

Cause: One or more Interchanges along the path to the destination desired has no more free connections available to be used for this call.

Action: Try again later when the Interchanges are less busy, or contact your network administrator to have him determine which interchange it is, and increase the number of connections available on that interchange.