MSL-FMU initialization error

[Helarga]

We are working to couple two different domains—thermal and electrical—using FMUs, but we’ve encountered multiple initialization issues. To troubleshoot, we decided to revisit some foundational examples from the Modelica Standard Library (MSL).

I simplified one of these examples, specifically Modelica.Thermal.HeatTransfer.Examples.GenerationOfFMUs, so only the upper part (DirectCapacity, InverseCapacity)which you can find here:

GenerationOfFMUs.mo

Exported two MSL components into FMUs

Modelica.Thermal.HeatTransfer.Examples.Utilities.DirectCapacity
Modelica.Thermal.HeatTransfer.Examples.Utilities.InverseCapacity

The generated FMUs are available at:

• DirectCapacity
• InverseCapacity

Despite this, we’re still facing similar initialization issues after running the example. The log file can be reviewed here:

Log File

Simulation Environment

• Software: OpenModelica v1.22.2
• Operating System: Windows 11
• FMI: ME2

I’ve tried implementing a few solutions, such as delaying the temperature signal by adding a filter before exporting the FMU, but these attempts have not resolved the issue so far.

Any insights or recommendations would be greatly appreciated. Thank you very much for your time and assistance!