Natural version 8.2.2 upgrade of existing old modules


I am currently working on upgradation of exisiting Natural objects,I can stow the objects with version 8.2. Please let mé know what steps I need to take care while upgrading Natural objects that were created with Natural Version 2.3, 3.1, 4.1 or 4.2. All these programs must be changed to run on version 3.1 which is in production now.

Nitin Dwivedi