Problem with Pre() with fixed variables

[Hassen]

This model turns correctly under Dymola and not under OpenModelica

model PreBug

Integer x(start=4,fixed=true);

equation

if time >0.1 and pre(x)== 10 then

x=pre(x)-1;

else

x=4;

end if;

end PreBug;

Note that if we change the if condition by (if time >0.1 and pre(x)== 4) the simulation will stop at time =0.1 under Dymola. This is du to the restart condition.

[Willi Braun]

Fixed with revision 6060!
The solvers euler, rungekutta and dassl2 stops also at time point 0.1.
But dassl remains in an infinite loop.