Hey Koldo,

I just tried the models inside Openmodelica with euler and the rungekutta solver. And those models I had the problems with did also not work in openmodelica while using the euler method but rungekuuta works fine. So I guess it has to be the solver. Thanks a lot

Best regards
kinzzoku

Hello,

I am using the forward Euler method to solve the differential equations. And the program should work with FMU for model exchange.


Best Regards

kinzzoku

Hello,

I am working with the generated FMU's and right now I am testing my program with some examples that are already implemented in OpenModelica Connection Editor, like "SpringWithMass", "PumpingSystem", "SimpleLiquidWater" and so on.

The program shall take the FMU and calculate the simulation.

And right now I have the problem that some FMU's work fine and some give me errors (different models are giving different errors).
I have already found out that models like "SimpleLiquidWater" are working directly while models like "SpringWithMass" give at first always the same kind of error.
When I say models like... I mean that the models have similarities in the graphical view. In the example of "SpringWithMass" there are shown the class Modelica.Mechanics.MultiBody.Parts.Body and the "Pictures" of Spring and World, while the "SimpleLiquidWater" is empty.
So models with that kind of Pictures like "SpringWithMass" in the graphical view are giving me at first a format exception in the XML-File. Where some values are set (in my cases it was always the value for "start") they are directly followed by something like this: "/*ENUM:StateSelect.prefer*/". I solved that kind of error with just deleting it. But after that some models work and some don't and those who don't work are giving different errors I cannot explain why they are there.

Has someone expierenced something similar and does know or has an idea how to solve that kind of problem?


Best regards,

kinzzoku