ORA-21500: internal error code, arguments: [string], [string], [string], [string], [string], [string], [string], [string]
ORA-21501: program could not allocate memory
ORA-21503: program terminated by fatal error
ORA-21520: database server driver not installed
ORA-21521: exceeded maximum number of connections in OCI (object mode only)
ORA-21522: attempted to use an invalid connection in OCI (object mode only)
ORA-21523: functionality not supported by the server (object mode only)
ORA-21524: object type mismatch
ORA-21525: attribute number or (collection element at index) string violated its constraints
ORA-21526: initialization failed
ORA-21527: internal OMS driver error
ORA-21560: argument string is null, invalid, or out of range
ORA-21561: OID generation failed
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