I'm trying to create a portal on a parent table but it doesn't populate with the child records. The screen shot from the relationships graph is below. I want to put a portal on the commentary detail layout so that all cases which are referenced in a commentary source appear in a portal. I have created a join table between cases and commentary detail called cases considered which includes, amongst other things a foreign key field for cases and a foreign key field for commentary detail. After not being able to populate the portal I created an additional table occurrence for the commentary detail table (called commentary detail 3 in the graph) hoping that would fix the problem but it hasn't.
In the portal setup I am showing related records from "Commentary Detail 3" and the fields in the portal are the cases foreign key field and the commentary detail foreign key. I suspect there is a problem with the relationship but I can't see where the problem lies.
Any help would be much appreciated!