Manual Update 1.6.1.1 to 1.7.6.2 error

[asianMP]

Hi!

I looking for help for my manual Update 1.6.1.1 to 1.7.6.2.

When I call the files for install/upgrade/upgrade.php

I get this error :

 

Notice: Use of undefined constant _DB_SERVER_ - assumed '_DB_SERVER_' in /home/powerbyfvn/www/classes/db/Db.php on line 219

Notice: Use of undefined constant _DB_USER_ - assumed '_DB_USER_' in /home/powerbyfvn/www/classes/db/Db.php on line 219

Notice: Use of undefined constant _DB_PASSWD_ - assumed '_DB_PASSWD_' in /home/powerbyfvn/www/classes/db/Db.php on line 219

Notice: Use of undefined constant _DB_NAME_ - assumed '_DB_NAME_' in /home/powerbyfvn/www/classes/db/Db.php on line 219

Fatal error: Uncaught PrestaShopException: Link to database cannot be established: SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Name or service not known in /home/powerbyfvn/www/classes/db/DbPDO.php:127 Stack trace: #0 /home/powerbyfvn/www/classes/db/Db.php(330): DbPDOCore->connect() #1 /home/powerbyfvn/www/classes/db/Db.php(241): DbCore->__construct('_DB_SERVER_', '_DB_USER_', '_DB_PASSWD_', '_DB_NAME_') #2 /home/powerbyfvn/www/src/PrestaShopBundle/Install/Upgrade.php(177): DbCore::getInstance() #3 /home/powerbyfvn/www/install/upgrade/upgrade.php(58): PrestaShopBundle\Install\Upgrade->__construct('/home/powerbyfv...', '/home/powerbyfv...') #4 {main} thrown in /home/powerbyfvn/www/classes/db/DbPDO.php on line 127

 

Thanks for your help!