>As many years as I have used FoxPro (since DOS) I am embarassed to ask this question, but it is beating me up.
>
>On some forms with Parent-Child files with the child in a grid, only those child records belonging to the parent appear. On others, the file pointer in the grid points to the first child record but shows records belonging to other parents as well (all tables opened in data environment and relations established there) What determines the behavior?

I personally use either local views or later cursor adapter rather than setting relations. IMHO, it's much simpler to use and there is less chances something would go wrong.