Cause: From the remote host`s server:
the database SID, specified in the login (connect) string, was not
recognized.
Action: Add the appropriate SID entry to
the CONFIG.ORA or oratab file on the remote host (restarting the remote server
may be needed).

Relared Errors:
ORA-06421:
NETCMN: Error detected in the read-in data
ORA-06422:
NETCMN: Error in sending data
ORA-06423:
NETCMN: Error in receiving data
ORA-06430:
ssaio: Seals do not match
ORA-06431:
ssaio: Invalid Block number
ORA-06432:
ssaio: Buffer Not Aligned
ORA-06433:
ssaio: LSEEK error, unable to seek to requested block.
ORA-06434:
ssaio: read error, unable to read requested block from database
file.
ORA-06435:
ssaio: write error, unable to write requested block to database
file.
ORA-06436:
ssaio: asynchronous I/O failed due to incorrect parameters.