Oracle Error ORA-12705: Cannot access NLS data files or invalid environment specified

Oracle Error Message

ORA-12705: Cannot access NLS data files or invalid environment specified

Reason for the Error

Either an attempt was made to issue an ALTER SESSION command with an invalid NLS parameter or value; or the environment variable(s) NLS_LANG, ORA_NLSxx, or ORACLE_HOME was incorrectly specified, therefore the NLS data files cannot be located.

Solution

Check the syntax of the ALTER SESSION command and the NLS parameter, correct the syntax and retry the statement, or specify the correct directory path/values in the environment variables.