I will try to explain this the more simple that I can:

I have a ListView that has a BO named PublicationsBO, the ListView has the usual Add, Edit, Delete buttons. I can add and edit records without problem using the ChildFormDialog.

The ChildForm has also a ListView that has ProductsForPublicationsBO, the relationships are setup and configured, I add a record manually and I can view in List and edit that record using another ChildFormDialog.

My problem is that if I add a new record to the ProductsForPublicationsBO the ParentKey field is not added -remains in 0 - so, this record is not realted to any Publication

In this same app, I use relationships, ChildFormDialogs but in all previous cases that dialogs are called from an MaintenanceForm, not from a ListView form - ChildForm. In all of those, the Parentkey is added by SF without problems.

Can you tell me how to add a new child correctly from a ChildForm?

Maybe StrataFlix does this, but I can not follow that sample because almost is done by code, and I'm not so good trying to addapt the ideas there.

Regards 

This could be due to the translations AFTER the BOs translated.  For grins, override the Onload of the child form.  After the MyBase.OnLoad() call, reset the instances of the relationship and I bet it will resolve your error.  The issue could be that the relationship is still referencing the original instance instead of the translated instance.

How do I override the onload? I never done this before.

Regards

Thanks, I add this and works:

Regards