Oracle Database Errors or Warnings from Error ORA-12171 to ORA-12204


ORA-12171: TNS:could not resolve connect identifier: string
Cause: A connection to a database or other service was requested using a connect identifier, and the connect identifier specified could not be resolved into a connect descriptor using one of the naming methods configured. For example, if the type of connect identifier used was a net service name then the net service name could not be found in a naming method repository, or the repository could not be located or reached.
– If you are using local naming (TNSNAMES.ORA file):

– Make sure that “TNSNAMES” is listed as one of the values of the NAMES.DIRECTORY_PATH parameter in the Oracle Net profile (SQLNET.ORA)

– Verify that a TNSNAMES.ORA file exists and is in the proper directory and is accessible.

– Check that the net service name used as the connect identifier exists in the TNSNAMES.ORA file.

– Make sure there are no syntax errors anywhere in the TNSNAMES.ORA file. Look for unmatched parentheses or stray characters. Errors in a TNSNAMES.ORA file may make it unusable.

– If you are using directory naming:

– Verify that “LDAP” is listed as one of the values of the NAMES.DIRETORY_PATH parameter in the Oracle Net profile (SQLNET.ORA).

– Verify that the LDAP directory server is up and that it is accessible.

– Verify that the net service name or database name used as the connect identifier is configured in the directory.

– Verify that the default context being used is correct by specifying a fully qualified net service name or a full LDAP DN as the connect identifier

– If you are using easy connect naming:

– Verify that “EZCONNECT” is listed as one of the values of the NAMES.DIRETORY_PATH parameter in the Oracle Net profile (SQLNET.ORA).

– Make sure the host, port and service name specified are correct.

– Try enclosing the connect identifier in quote marks. See the Oracle Net Services Administrators Guide or the Oracle operating system specific guide for more information on naming.

ORA-12196: TNS:received an error from TNS
Cause: The navigation layer received an error from TNS.
Action: See the error log file for the specific TNS error.
ORA-12197: TNS:keyword-value resolution error
Cause: The navigation layer received an error while trying to look up a value for a keyword.
Action: Check the syntax of the connect descriptor.

ORA-12198: TNS:could not find path to destination
Cause: Could not navigate a path through Interchanges to the destination. This error occurs if an invalid community is in the address string, or the address includes a protocol that is not available or the TNSNAV.ORA file does not have a correct CMANAGER address specified or the Interchange is down.
Action: Assure that Interchanges necessary to get to the desired destination are up and have available capacity for an additional connection. Also check that the correct community and protocol have been specified in the CMANAGER address used.
ORA-12200: TNS:could not allocate memory
Cause: Out of memory on machine.
Action: Reconfigure machine to have more storage or run fewer applications while the Interchange is running.
ORA-12201: TNS:encountered too small a connection buffer
Cause: TNS connection buffer supplied by the application was too small to retrieve the data sent back.
Action: Supply a larger connection buffer. If problem persists, call Worldwide Customer Support.

ORA-12202: TNS:internal navigation error
Cause: Internal navigation error.
Action: Not normally visible to the user. For further details contact Worldwide Customer Support.
ORA-12203: TNS:unable to connect to destination
Cause: Invalid address specified or destination is not listening. This error can also occur because of underlying network or network transport problems.
Action: Verify that the net service name you entered was correct. Verify that the ADDRESS portion of the connect descriptor which corresponds to the net service name is correct. Ensure that the destination process (for example the listener) is running at the remote node.
ORA-12204: TNS:received data refused from an application
Cause: The application using Connection Manager refused the connection at the listener.
Action: Make sure that the application listener at the destination is functioning correctly. If it is and the problem persists, contact Worldwide Customer Support.

Above are list of Oracle Database Errors or Warnings from Error ORA-12171 to ORA-12204 received while performing certain operation against Oracle Database or related products.

What are Oracle Database Error Messages?

Oracle Error Messages may be returned while using products which are part of Oracle Database.  Each Oracle Database Error or Warning Message mentioned above contains the Warning or Error Message Statement, a short explanation of the probable causes of the Error message, and a recommended action.

Hope this was helpful.

SQLServerF1 Team
Information about Oracle Database Error Messages or Warning Messages on Windows and Linux Operating Systems.


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