ORA-00604 / ORA-12705

ORA-00604: error occurred at recursive SQL level 1 ORA-12705: Cannot access NLS data files or invalid environment specified You might see this combination of error messages in a situation where an Oracle 12c listener is used to service an Oracle11G database, and static service registration is used in the listener (without specifying the NLS_ORA10 variable) Read more about ORA-00604 / ORA-12705[…]