Simplifications of boolean variables in initialization problems

[Francesco Casella]

We have a tough use case of a hydraulic circuit with homotopy-based initialization. The system is driven by a boolean variable.

In the base case, the boolean variable is set to false by an equation,

...
  Boolean cmd;
equation
  cmd = false;
...

and the initialization problem is solved successfully. If we set up simulations where the initial value of the boolean variable is false, but then it is later switched to true

... 
  Boolean cmd(final start = false, final fixed = true);
equation
  when time > 500 then
    cmd = true;
  end when;

or

...
   Boolean cmd;
initial equation
   cmd = false;
equation
...
  when time > 500 then
    cmd = true;
  end when;
...

then the initialization fails.

IMHO the initialization problem should have exactly the same structure in the three cases. Why doesn't it?

[Francesco Casella]

Retargeted to 1.17.0 after 1.16.0 release

[Francesco Casella]

Retargeted to 1.18.0 because of 1.17.0 timed release.

[Francesco Casella]

Ticket retargeted after milestone closed