Unable to open RPC connection to external procedure agent
ORA-28576 – Oracle Error Code
Lost RPC connection to external procedure agent
ORA-28577 – Oracle Error Code
Argument string of external procedure string has unsupported datatype string
ORA-28578 – Oracle Error Code
Protocol error during callback from an external procedure
ORA-28579 – Oracle Error Code
Network error during callback from external procedure agent
ORA-28580 – Oracle Error Code
Recursive external procedures are not supported
ORA-28552 – Oracle Error Code
Pass-through SQL: call flow error
ORA-28553 – Oracle Error Code
Pass-through SQL: invalid bind-variable position
ORA-28527 – Oracle Error Code
Heterogeneous Services datatype mapping error
ORA-28554 – Oracle Error Code
Pass-through SQL: out of cursors