Roberto,
I found the cause but not the solution.
In my original code I use already your suggestion for 4 button call as you ammended the code for me.
I undressed my code step by step using the all variable sample.
At one point it was exactly the same except for 2 lines of code....................
This causes the screen not jump to userscreen.
When I // the line I get the userscreen to show. As soon as I remove the // then the userscreen does not show.
// initialize the menu object (20 colums x 4 rows LCD)
menu.begin(&lcd,20,4);
menu.addUsrNav(navMenu); // @@@@@@@@@@@@@@@@@@@@@@ this causes the userscreen not to show!!!!!!!!!!!!!1
MW_navbtn=4; // force 4 buttons mode
Paco