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DrModelica - Complex Example OMC-Error - Variable a.re not referenced

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DrModelica - Complex Example OMC-Error - Variable a.re not referenced

Apr-09-14 22:46:05

I'm just starting to learn Modelica and working through the DrModelica tutorial.
In 'Packages as Abstract Data Types' (PackasADTs.onb),
simulating the following code I'm getting an error I can't figure out.
Has anyone run into this?

Note: I'm using OpenModelica 1.9.1 Beta2 (r19512) (RML version)


Code:

encapsulated package ComplexNumbersA



  function Add = Complex.Add;



  function Multiply = Complex.Multiply;



  function MakeComplex = Complex.MakeComplex;





  class Complex



    protected

      Real re;

      Real im;



    public

      function Add

        input Complex x;

        input Complex y;

        output Complex z;

      algorithm

        z.re:=x.re+y.re;

        z.im:=x.im+y.im;

      end Add;



      function Multiply

        input Complex x;

        input Complex y;

        output Complex z;

      algorithm

        z.re:=x.re*y.re-x.im*y.im;

        z.im:=x.re*y.im+x.im*y.re;

      end Multiply;



      function MakeComplex

        input Real x;

        input Real y;

        output Complex z;

      algorithm

        z.re:=x;

        z.im:=y;

      end MakeComplex;



    end Complex;



end ComplexNumbersA;

{ComplexNumbersA}

Code:

class ComplexUser3

  ComplexNumbersA.Complex  a = ComplexNumbersA.MakeComplex(1.0, 2.0);

  ComplexNumbersA.Complex  b = ComplexNumbersA.MakeComplex(1.0, 2.0);

  ComplexNumbersA.Complex  z, w;

equation

  z = ComplexNumbersA.Multiply(a, b);

  w = ComplexNumbersA.Add(a, b);

end ComplexUser3;

{ComplexUser3}

Code:

simulate(ComplexUser3)

record SimulationResult
    resultFile = "",
    messages = "Failed to build model: ComplexUser3"
end SimulationResult;
OMC-ERROR:
"[<interactive>:13:7-13:14:writable] Error: Variable a.re is not referenced in any equation (possibly after symbolic manipulations).
"

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