http://developers.de/blogs/damir_dobric/archive/2007/12/10/workflow-runtime-error.aspxWhile starting the workflow you may encounter following error: "Test method TestProject.WorkflowTest.TestWorkflow threw exception: System.InvalidOperationException: WorkflowRuntime container does not contain ExternalDataExchangeService." ThisenCommunityServer 2008 SP1 (Build: 30619.63)