start-value are not initialized correctly

[Willi Braun]

In following simple example:

loadString("
model B
  parameter Real a(fixed=false);
  parameter Real b(fixed=false);
  Real w(start=a);
  Real y(start=b);
initial equation
  a=4;
  b=6;
equation
  sin(w*y)+cos(w)*y=time;
  sin(w*y)+sin(y)+w=(a+b)*time;
end B;
");
getErrorString();

simulate(B, stopTime=0.5);
getErrorString();

the start-values of the iteration variables y,w are set to zero an not as expected to 4 and 6.

[Lennart Ochel]

Which libraries are affected by this?

[Francesco Casella]

This affects the large-scale power system models that we have been developing for CESI/TERNA. It will sure enough be critical for RTE and all of their power system models, and it is also critical for the paper we are presenting at the next Modelica Conference, because it hinders the initialization of the larger test cases.

[Lennart Ochel]

I've fixed this (and a couple of related bugs) with the following pull requests:

• ​OMCompiler#1573
• ​OMCompiler#1579
• ​OMCompiler#1586
• ​OMCompiler#1587