is it possible to share your code?

Hi,

I hereby attached the code.
RH-CANN-Hp1-polynomial.mo

Thanks in advance!

Ale

The initialization problem is inconsistent due to the following equation: 0 != -4.05568 = $START.Pv - Pv

I got the above error. So the problem is with initialization.

Real Pv(start = 1, fixed = true); // state variable - ventricular pressure

it works when I set fixed to false. But i don't know if the simulation results are correct.

From  Modelica by Example

fixed

    The fixed attribute changes the way the start attribute is used when the start attribute is used as an initial condition. Normally, the start attribute is considered a “fallback” initial condition and only used if there are insufficient initial conditions explicitly specified in the initial equation sections. However, if the fixed attribute is set to true, then the start attribute is treated as if it was used as an explicit initial equation (i.e., it is no longer used as a fallback, but instead treated as a strict initial condition).

    Another, more obscure, use of the fixed attribute is for “computed parameters”. In rare cases where a parameter cannot be initialized explicitly, it is possible to provide a general equation for the parameter in an initial equation section. But in cases where the parameter is initialized in this way, the fixed attribute for the parameter variable must be set to false.

    Default: false (except for parameter variables, where it is true by default)

    Type: Boolean