The root TypeDescriptor with Name '{0}' belonging to Method with Name '{1}', of Entity with Name '{2}' and Namespace '{3}' ...

The root TypeDescriptor with Name '{0}' belonging to Method with Name '{1}', of Entity with Name '{2}' and Namespace '{3}' does not have exactly one child or that child is not assignable to System.Data.IDataRecord, which is necessary when using LobSystems of Type Database.