Problem detecting discontinuity

[fedebergero@…]

I have the following model

model test
  discrete Real z(start = 0);
algorithm
  when time >= 0 then
      z:=1;  
  end when;
end test;

If I simulate it, variable z does not get assigned 1 when the simulation starts (when time=0).

If I write it like:

model test
  discrete Real z(start = 0);
algorithm
  when time > 0 then
      z:=1;  
  end when;
end test;

(changing Greater equal for greater) it works (z get assigned at the begging of the simulation).

I think both models should behave the same, right?
Regards
Fede

[Willi Braun]

No, an event for a when statement is *only* triggered when the condition b changes from false to true. In your first case the condition is true, since startTime=0 => time>=0 => true. So the condition never changes and the variable z is never assigned. That's correct!