Error - "The requested users to be added do not exist."

	// Build usernames to add

	$usernames = (isset($_REQUEST['username'])) ? array(request_var('username', '', true)) : array();

	$username_list = request_var('username_list', '', true);

	if ($username_list)

	{

		$usernames = array_merge($usernames, explode("\n", $username_list));

	}

		// Reveal the correct user_ids

		if (sizeof($usernames))

		{

			$user_id_ary = array();

			user_get_id_name($user_id_ary, $usernames, array(USER_NORMAL, USER_FOUNDER, USER_INACTIVE));

			// If there are users not existing, we will at least print a notice...

			if (!sizeof($user_id_ary))

			{

				$error[] = $user->lang['PM_NO_USERS'];

			}

		}