unbalanced models by duplicate inheritance

[Christian Schubert]

The attached model F uses duplicate inheritance and generates redundant equations of the form

2 (1): e.port.f = 0.0
3 (1): e.d.port.f = 0.0
4 (1): e.d.port.f - e.port.f = 0.0

where there is one equation too many. This may also be related to Brunos problem.

[Adrian Pop]

Just a bit more explanation...
This equation should not be generated:

e.d.port.f = 0.0;

Somehow it seems that e.d.port.f is added to a connection set as inside connector because is flow, but then when the connection to e.port.f is done is not detected that we already have a set containing e.d.port.f and a new set is created with the connection to e.port.f.

adrpo@ida-liu050 /c/dev/avm
$ time ~/dev/OpenModelica/build/bin/omc +locale=C +d=showEquationSource Unbalanced.mo
class F
  Real e.port.p "potential Variable";
  Real e.port.f "flow Variable";
  Real e.d.port.p "potential Variable";
  Real e.d.port.f "flow Variable";
equation
  e.d.port.f = e.d.port.p /* models: D */;
  e.port.f = 0.0 " equation generated by unconnected inside flow, maybe connected later" /* models:  */;
  e.d.port.f = 0.0 " equation generated by unconnected inside flow, maybe connected later" /* models:  */;
  (-e.port.f) + e.d.port.f = 0.0 " equation generated by unconnected inside flow, maybe connected later" /* models: E */;
  e.d.port.p = e.port.p /* models: E */;
end F;

[Per Östlund]

Fixed in r13982.