ORA-28523: ORACLE and heterogeneous agent are incompatible versions

Cause : An operation on a database link attempted to connect to a non-Oracle system, but the ORACLE instance and the agent process for the non-Oracle system are incompatible.

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

Ask your DBA to confirm configuration of both the ORACLE instance and the agent. Additional information on the version incompatibility is logged in trace (*.TRC) files, the ORACLE instance and the agent, and in the ORACLE instance's alert log. Check the documentation for your agent to find out which releases of the Oracle Server are supported.

update : 17-08-2017
ORA-28523

ORA-28523 - ORACLE and heterogeneous agent are incompatible versions
ORA-28523 - ORACLE and heterogeneous agent are incompatible versions

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