Oracle Error Message
ORA-28559: FDS_CLASS_NAME is string, FDS_INST_NAME is string
Reason for the Error
An associated error was reported in another message, and this message supplies supplementary information to assist diagnosis of that error. FDS_CLASS_NAME and FDS_INST_NAME are used to access information in tables and views of the ORACLE data dictionary that direct operation of Heterogeneous Services on a database link to a non-Oracle data store.
Solution
Use the FDS_CLASS_NAME and FDS_INST_NAME values to check ORACLE data dictionary contents when necessary to diagnose the cause of the associated error.