Thanks for your fast reply,
I just change the Buffer Full indicator and now the event structure works properly. BUT if I remove the max queue size, the number of elements displayed would be in increment.
drjdpowell, sorry, I don't understand where I'm wrong with the numbers of iterations.
When I run the highlight execution the queue get the correct size of elements, 5 in this case, then the event structure flush the queue, and start again from element 1 to 6, 5 again but this time it doesn't trigger the event structure and the for loop keeps waiting.
the main reason of doing this VI with queues, event structures, etc is because in the future this project can require real-time data from a mic or a NI card, or the possibility to add a scroll signal. So I think this form will be more scalable solution but if you know another way better to do it, please make me know it.
thank you so much