No – you’ll need to have them both on SS4. One reason is the Orchestration FrameWork database will be converted by the head. Then the tail won't be able to connect. Another reason is the Orchestration FrameWork database on SS3 or earlier will not transfer over with DCS on SS4. With that said we recommend recreating the Orchestration FrameWork database.
What does that OFW Database contain?
i. It is recommended that you recreate your jobs as some of the settings have changed from versions prior to SS4.
Can I run a dmsconvert on the OFW database?
When you have multiple installations of ProjectWise Orchestration Framework Service, it is recommended that you use the same Orchestration Framework database for all of them.