A heterogenous array in array of records ***.* is not supported. Warning: Undeclared variable or command: ***.*

Question

I have a very simple fluid model : a source, a meshed pipe, a sink. Dymola (2024x) choose, among the initialization variables, the value of the enthalpy h in some of the nodes. However the initial value is not good enough to find a solution and the solver fails to initialize the simulation.

I know a better guess value and I achieve in initializing the simulation by adding h(each start=my_better_value) in te text of my model but I did not found any way to provide just the value in the specific node Dymola is asking.

For example, in the variable browser, among the initial values, Dymola only shows the my_module.h[2]. However, if I try to modify this sole value I get the following messages in the command panel and my change does not take effect:

A heterogenous array in array of records my_module.h is not supported. 
Warning: Undeclared variable or command: my_module.h

Why is this happening? I am pretty sure of having independently modified the values of an array in the past... What else can I do to set the initial value (instead of the each start command)?

EDIT - Actual example

This is an "elementary" test case to reproduce the issue. It is based on the ThermoSysPro library.

model BOP
  ThermoSysPro.Fluid.BoundaryConditions.SourceQ sourceQ(
    Q0=10,
    T0=500);

  ThermoSysPro.Fluid.BoundaryConditions.SinkP sinkP;

  ThermoSysPro.Fluid.HeatExchangers.DynamicOnePhaseFlowPipe
    dynamicOnePhaseFlowPipe(
    Ns=1,
    h(each start=2.e6));
equation 
  connect(dynamicOnePhaseFlowPipe.C1, sourceQ.C);
  connect(dynamicOnePhaseFlowPipe.C2, sinkP.C);
end BOP;

Answer 1

The error message is only expected to occur if my_module is also an array (of components) where each element has an array h of a different length.

Like the following:

  model MyModule
    parameter Integer n;
    Real h[n];
  equation 
    sin(h)+1e-3*h=zeros(n); // Non-linear system
  end MyModule;
  MyModule my_module[2](n={2,1});

It might be that it can also occur for just a plain array in some very rare cases, but we would need the model to see why.

The work-around is similar in both cases - introduce a new alias to the specific element and give it a start-value:

 Real x(start=...)=my_module[1].h[1];

And you should then be able to set the start-value of x after translation in the usual way.