I'm guessing a bit here about how you've set up your layout, but it seems that you've based your layout on the Companies prod table occurrence which makes your portal of products work as there is a link between Companies prod and Products. But with that arrangement, you don't have a table occurrence that links Products to your Companies prod table occurrence by Distributer code and this keeps you from setting up the second portal.
You'll need another table occurrence or you could set up your TO's this way:
Companies::Code = ProductsByProd:: ProducerCode
Companies::Code = ProductsByDist:: DistributorCode
Now base your layout on Companies.
Thanks a lot for the quick and perfect answer. It seems I'm still a bit confused by this TO proliferation. But of course this means I need to get more experience with the FM development system.
So I added another TO for Products and based my layout on the Company table (even graphically clear: the Company table between the two Product tables originating the two portals shown). And, since I needed also the Distributer and Producer names in the Product layout, ended up with two "real" tables and four TOs in the relationship graphic. But everything seems working now, so I suppose I have to get acquainted to this (for me) strange attitude.
Anyway, thanks again
If you take the time to compose some "Psuedo SQL" and compare the expressions to the Relationship graph, you should find quite a few similarities. It's just that it's now presented in a very different format. I have worked previously with the MS Access Relationships tool and this made the Graph familiar territory for me as it's fairly similar.
You might find the following link helpful:
Table vs. Table Occurrence (Tutorial)