>I run tests
>
>The problem was in the first form, not in the second
>
>I removed the relation and used "set filter" instead
>
>It works well now
>
>Do you think this seems a suitable solution or looks like a workaround ?
>
>Moises

In my opinion using SET FILTER is not a good idea. I would prefer using either cursor adapter with a filter or a local view if we're talking parent/child tables relations.