Ora-28557 unknown string for database

 ORA-28557 unknown string for database link to non-Oracle system

    Oracle Database Error Code Messages ORA-28557 Description About Help;

Unknown string for database link to non-Oracle system 

    Error Problem Cause;

When attempting to connect to a non-Oracle system through a Heterogeneous Services database link, the agent supporting this non-Oracle system failed to return FDS_CLASS_NAME and/or FDS_INST_NAME. Oracle requires these names to configure the heterogeneous database link.

    How to Solve; ORA-28557 unknown string for database link to non-Oracle system?

    Fix Action for Solve Ora-28557;

Contact the database administrator to check setup of the connection and the Heterogeneous Services agent.

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