Python decision trees using orange

I am using orange data mining and machine learning. Recent releases of Orange appear to permit serialization of decision trees, pickling in python. The existing documentation for older releases of Orange say that classifier objects such as decision trees are not picklable. In test cases I have been able to pickle and unpickle decision trees, but I can't get it to work in the production environment. The project is to either make the pickling work or represent the trees in a different structure that is picklable.