Pantelides fails in a small model

[massimo ceraolo]

I have a class of models for which the following error is issued (using OM r21397).

[:0:0-0:0] Error: Internal error Transformation Module PFPlusExt index Reduction Method Pantelides failed!

Now I've created a small model (31 equations, 22 of which trivial), in which the issue occurs.
Maybe it is of use for the whole OM community to have this issue approached.
Here's the model:

model commTest0
  model Commutator
    parameter Integer m(final min = 1);
    Modelica.Electrical.Analog.Interfaces.PositivePin pin_pm[m];
    Modelica.Electrical.Analog.Interfaces.PositivePin pin_p;
    Modelica.Blocks.Interfaces.IntegerInput z;
  equation
    pin_p.v = pin_pm[z].v;
    for j in 1:m loop
      pin_pm[j].i = if j == z then -pin_p.i else 0;
    end for;
  end Commutator;

  Commutator commutator(m = 2);
  Modelica.Electrical.Analog.Basic.Resistor resistor(R = 2);
  Modelica.Electrical.Analog.Basic.Ground ground;
  Modelica.Electrical.Analog.Sources.ConstantVoltage E1(V = 100);
  Modelica.Electrical.Analog.Sources.ConstantVoltage E2(V = 200);
  Modelica.Blocks.Sources.IntegerConstant intConst(k = 1);
equation
  connect(commutator.pin_p, resistor.p);
  connect(resistor.n, ground.p);
  connect(E1.p, commutator.pin_pm[1]);
  connect(E2.p, commutator.pin_pm[2]);
  connect(E1.n, ground.p);
  connect(E2.n, ground.p);
  connect(commutator.z, intConst.y);
end commTest0;

[Lennart Ochel]

The pre-optimization module removeSimpleEquations fails before the index-reduction takes place.

[Martin Sjölund]

This ticket was not closed for 1.9.1, which has now been released. It was batch modified for milestone 1.9.2 (but maybe an empty milestone was more appropriate; feel free to change it).

[Martin Sjölund]

Milestone changed to 1.9.3 since 1.9.2 was released.

[Martin Sjölund]

Moved to new milestone 1.9.4

[Martin Sjölund]

Milestone pushed to 1.9.5

[Martin Sjölund]

Milestone renamed

[Francesco Casella]

I have checked this test case with v1.11.0-dev14 and it compiles fine.

[massimo ceraolo]

I've checked.
Not it compiles but gives wrong results. I will open a brand new ticket for this.

[Martin Sjölund]

Milestone deleted