I used Modelica 1.9.0 Beta 2 revision 13495 on Windows7. Today I installed the newest version of Modelica 1.9.0 Beta 4 revision 15030 but the problem is still the same.

Hi, I try to compile a simple code

class Iteration_step



import Modelica.SIunits;

parameter SIunits.Time delta_t = 0.5;



constant Real a[:] = {4,2,6,-1,3,5,7,4,-3,-6};

Real x;

Integer j(start=1);



algorithm

    when sample(0, delta_t) then

    x := a[j];

    j := j + 1;    

    end when;



end Iteration_step;

but i get this errow message: Assertion failed: NULL == \

Has anybody an idea?