[HyperDB] Invalid argument supplied for foreach() in db.php on line 638

[Andy Skelton]

> *add_db_server('global', 0,    '', 1, 1,  RW_DB_HOST,    RW_DB_HOST,
>    DB_NAME,     DB_USER,     DB_PASSWORD);*

What is in $db_servers after that line?

What is $this->single_db at db.php line 249?

What is $GLOBALS['db_servers'] at db.php line 244?

Andy