ORA-24778: cannot open connections

Cause : The migratable transaction tried to access a remote database when the session itself had opened connections to remote database(s).

Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts

Close the connection(s) in the session and then try to access the remote database from the migratable transaction. If the error still occurs, contact Oracle customer support.

update : 26-04-2017
ORA-24778

ORA-24778 - cannot open connections
ORA-24778 - cannot open connections

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