ORA-12154: TNS:could not resolve service name
 *Cause:  The service name specified is not defined correctly in the
 TNSNAMES.ORA file.
 *Action:  Make the following checks and correct the error:
           - Verify that a TNSNAMES.ORA file exists and is in the proper
             place and accessible. See the operating system specific manual
             for details on the required name and location.
           - Check to see that the service name exists in one of the
             TNSNAMES.ORA files and add it if necessary.
           - Make sure there are no syntax errors anywhere in the file.
             Particularly look for unmatched parentheses or stray characters.
             Any error in a TNSNAMES.ORA file makes it unusable. See
             Chapter 4 in the SQL*Net V2 Administrator's Guide. If
               possible, regenerate the configuration files using the Oracle
               Network Manager.