When Eventframe Batches are created by a Batch Interface, the used Unit in the plant is created as Element in AF and linked to the Unitprocedure EventFrame. Unfortunately it is not linked to the parent Procedure Event, leaving the "referenced Element" list of procedure event empty.
If a user wants to create a report over all Procedures a certain unit was involved, he has to download all Procedure Events and Unitprocedures via Datalink and do the filtering there.
With PI Batch it was possible to search for PI Batches using PI UnitBatch criteria like Unitname. We need this feature in Eventframes as well and could achive this by linking the referenced Elements of the child Unitprocedures to the Procedure Event or by creating a new filter mechanism in the eventsearch. I would prefer the referenced elements though.