Order Version Error on open

[MattW]

Came across what appears to be a bug with the OrderIdentifier when using the default version retrieved from a search:
The following code throws the error "Exclusive locks are only supported when opening the latest order version.":

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var oi = os.Orders.Where(x => x.Number == owd.OrderNumber).FirstOrDefault();
var identifier = oi.Identifier;
var order = os.OpenOrder(identifier, OrderEditMode.ReadWrite);

However if changed to explicitly use the Latest on OrderIdentifier it works reliably (shown in the following):

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var oi = os.Orders.Where(x => x.Number == owd.OrderNumber).FirstOrDefault();
var identifier = oi.Identifier.Latest;	<-- UPDATE
var order = os.OpenOrder(identifier, OrderEditMode.ReadWrite);

I'd like to confirm that this is indeed a bug, otherwise what is the intended process for reliably opening the latest version of the order (I was of the impression that, unless explicitly specified, OrderInfo.Identifer defaults to the latest version).

[BobRichards]

I will forward the activity you have observed for review. Thanks. One way to use the OrderIdentifier to open an order is:

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// Get the order guid from the order store.
//    Constructor will default version to -1 which is used as a flag to mean "most recent".
OrderIdentifier oi = new OrderIdentifier(orderGuid);
IOrder order = os.OpenOrder(oi, OrderEditMode.ReadWrite);

This behavior is discussed in the SDK by searching for "OrderIdentifier". Also, you can see an example of searching and opening orders in the SDK topic "How-To / Standalone Application Development / Open an Order".