flexi auth - A user authentication library for CodeIgniter

[eluser]haseydesign[/eluser]
@NotSmilie

Well as the error states, your error in the SQL is caused by an undefined var on line 310 of flexi_auth_model.php which is:

Code:

$sql_update[$this->auth->tbl_col_user_account[$key]] = $user_data[$column];

To work out which var is undefined, just try outputting each var to track down which var is undefined.
Example:

Code:

var_dump($this->auth->tbl_col_user_account[$key]);
var_dump($user_data[$column]);

This should at least give you a new set of clues.