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

    admin November 15, 2022 No Comments

    Oracle Error Message

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

    Reason for the Error

    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.

    Solution

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

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