Aug 152006
 

If you are setting up a self correllating child orchestration, ask see and your orchestration is in its own project, you need to make sure that the port type (some.PortType) that is defined has the Type Modifier set to External.

It makes sense, well, the logic makes sense, the error does not. If you are going to be reusing this orchestration in multiple projects and they are not contained in the same assembly, it needs to be set to Public so that the other orchestrations can implement it.