Description:
------------
in php.log I see (2 times for the last month):

[20-Jul-2012 12:12:32] PHP Catchable fatal error:  Argument 2 passed to PendingOrderService::PreparePendingOrder() must be an array, null given, called in /srv/www/example.org/public_html/OrderHelper.php on line 478 and defined in /srv/www/example.org/public_html/bll/PendingOrderService.php on line 58

...
// OrderHelper.php, Line 478:
$order = PendingOrderService::PreparePendingOrder($customer, $orderLines, $isDDP, $CustomerOrderN);
PendingOrderService::AddOrder($order, $_SESSION['RestrictWithMinPrices']);

CustomerActionsLogAccessor::AddLogEntry(
          $CustomerID, ADD_PENDING_ORDER_FROM_EXCEL, $CustomerOrderN, count($orderLines) . " positions", '');
...

...
// PendingOrderService.php, Line 58:
public static function PreparePendingOrder(Customer $customer, array $orderLines, $isDDP, $orderN = null)
...

At the same time in my log I see that the order was added on [20-Jul-2012 12:12:32] (same time when fatal error was logged) and the log contains "419 positions", so count($orderLines) executed successfully and it means $orderLines was array and not null. Also I see the saved order in the database with timestamp [20-Jul-2012 12:12:32].

So, everything went fine, $orderLines was not null, but still I got that log entry.