Jeff,

>It seems that the problem is that c# (and VB also) do not support inheritance in generics (C# generics are 'invariant' - see http://blogs.msdn.com/rmbyers/archive/2005/02/16/375079.aspx).
>
>Based on this article and others I have read, it seems that I cannot create routines that can process the new business objects in a general manner. Specifically, writing a routine to handle ABusinessObject and then provide a specific business object (Invoices) as a parameter.
>
>If my conclusion is incorrect, I would very much like to have the error of my ways pointed out to me. As it is, it looks like I will be rolling back to MM 2.3.

Did your change your ABusinessObject definition to the following as mentioned in the What's New Guide?

public class ABusinessObject<EntityType> : mmBusinessObjectGeneric<EntityType>
		where EntityType : mmBusinessEntity, new()
{

Best Regards,

Kevin McNeish
Eight-Time .NET MVP
VFP and iOS Author, Speaker & Trainer
Oak Leaf Enterprises, Inc.
Chief Architect, MM Framework
http://www.oakleafsd.com