Hi Manuel,
I did as you suggested and it works. The problem is that I have further treatment occurring in the same screen.
i.e.: When user type in X Material of EA measure, a field in the screen must be enabled, if it was Ton then another and so on.
As I'm running out of time with this problem, I'll use your solution and add a refresh button near the ALV container to force a PAI call and execute CHECK_CHANGED_DATA.
Thank you for your reply.
Regards,
Leandro