ORA-28557

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

Causa: 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.

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