Now it works!!! Thank you very much Jean Pierre!!! On 09/05/2014 13:38, jean pierre aubry wrote: > of course it does not! > i missed the line definition within the loop > assuming first node of the beam is num and second num+1 > it can be much more sophisticated > the loop should be > For num In {1:100} > Line(num) = {num, num+1}; > beam[]+= {num} > EndFor