This should only be used to update a one-to-one relationship between dRofus Occurrences and instances in Revit. This means that it is not recommended to sync planned Items in Rooms, but is best suited for syncing Systems or Items as Doors

Before you can sync current view you need to :

Sync instance in current view

In the drop-down-menu located in the “Systems/ Ocurrences” section within the ribbon select either:

a) “Sync current view (no prompt)” to start synchronizing.

b) “Sync current view” to see the synchronization options before starting to synchronize:

Prior to the completion of the synchronization process, a preview of the occurrences that will be created and updated (refer below) will be provided to you. This preview will enable you to assess the extent of the operation before finalizing it.