Start value for final parameters with fixed=false is ignored

[Francesco Casella]

Consider the following model (also attached)

model TestInitStart
  final parameter Real p(start = p_start, fixed = false);
  parameter Real p_start = -2;
initial equation
 (p - 1)*p*(p+2) = 0;
annotation(__OpenModelica_simulationFlags(lv="LOG_NLS_V"));
end TestInitStart;

The Newton solver log clearly shows that the iterations start at p = 0, not at p = -2 as expected, leading the convergence to the wrong solution.

This issue is preventing me to initialize in steady-state the big power plant model that I will present at the OpenModelica Workshop next week, so fixing this issue is currently top priority to show that OpenModelica can handle such real-life, complex models effectively.