http://developers.de/blogs/damir_dobric/archive/2009/04/10/declarative-workflow-services-4-0-error-a-location-cannot-be-generated.aspxProblem Description When working with declarative workflow services 4.0 you may get this message in the workflow service which receive an asynchronous the message. System.WorkflowModel 4.0.10924.1: Throwing exception: System.InvalidOperationExceptionenCommunityServer 2008 SP1 (Build: 30619.63)