Thanks for your relay but I think the < ain't gonna fix the problem. The only thing that is gonna change is de number of iterations to loop is making. >99 is true @ loop x = 100. <99 is true @ loop x = 99;
So in both cases the value x should be in the Serial print. And there not.
That's why I think it is not in the code but more in de Arduino due or Arduino IDE. I hope that someone can tell me more about this problem.