How to resolve ORA-12154 TNS error?

How to resolve ORA-12154 TNS error?

How to resolve ORA-12154 TNS error?

Resolution

  1. Option #1. Make sure that the TNSNAMES. ORA file exists and is in the correct directory.
  2. Option #2. Make sure that the service name that you are connecting to is included in the TNSNAMES. ORA file and that it is correctly defined.
  3. Option #3. Make sure that there are no syntax errors in the TNSNAMES. ORA file.

Could not resolve TNS name?

The “ORA-12154: TNS:could not resolve the connect identifier specified” Oracle error is a commonly seen message for database administrators. ora from the wrong ORACLE_HOME. The program is not using a fully qualified service name, but no default domain is enabled in sqlnet.

Could not connect to database ORA-12154 TNS could not resolve the connect identifier specified?

Answer: The ORA-12154 is a very common error, always related to your local copy of the tnsnames. ora file, your listener configuration and your database name aliases. Make sure that your listener is listening for the same service name that you are using.

Could not resolve the connect identifier specified sqlplus?

How to Resolve ORA-12154: TNS:could not resolve the connect identifier specified. ORA-12154 means that your connection tools including sqlplus cannot use TNSNAMES naming method for some reason. This reminds me that there’re same error patterns in TNS-03505: Failed to resolve name.

How do I resolve TNS?

The Solution

  1. Make sure that “TNSNAMES” is listed as one of the values of the NAMES. DIRECTORY_PATH parameter in the Oracle Net profile (SQLNET.
  2. Verify that a TNSNAMES.
  3. Check that the net service name used as the connect identifier exists in the TNSNAMES.
  4. Make sure there are no syntax errors anywhere in the TNSNAMES.

What is TNS_ADMIN?

TNS_ADMIN is an environment variable that points to the directory where the SQL*Net configuration files (like sqlnet. ora and tnsnames. ora) are located.

How do I open a TNS file?

Directions:

  1. Begin by clicking on Start > All Programs > Accessories.
  2. Right-click on Notepad and select Run as administrator.
  3. In Notepad, click on File > Open.
  4. Locate the folder where you installed the Oracle Client (ORACLE_HOME).
  5. If files named tnsnames.

Where is the TNS file located?

ORACLE_HOME/network/admin directory
By default, the tnsnames. ora file is located in the ORACLE_HOME/network/admin directory. Oracle Net will check the other directories for the configuration file. For example, the order checking the tnsnames.

How do you fix TNS could not resolve the connect identifier specified?