Error in Co-Simulation Simulink FMU and STAR-CCM+

Hi!

I am trying to do a Co-Simulation between Simulink and STAR-CCM+ by exporting the simulink model to FMU. When I try to run the simulation from STAR-CCM+ it gives me the following error:

INFO: Processing event 'Step FMU'

Connection reset by peer

Connection reset

Server connection failed. This is usually due to a fatal error in the server or a network issue.

Design Simcenter STAR-CCM+ simulation completed

Server process exited with code : -1073741571

I think the mistake is at the moment of exporting it to FMU because it is not able to interchange data with it but I am a bit lost at this point. When exporting it I select the acces source code from FMU option as I've read in different sites. Am I missing something else? Does anyone know where this could come from?

Thanks!

[Marina Espejo]

this is the detailed error

java.net.SocketException: Connection reset

at java.base/sun.nio.ch.NioSocketImpl.implRead(NioSocketImpl.java:323)

at java.base/sun.nio.ch.NioSocketImpl.read(NioSocketImpl.java:350)

at java.base/sun.nio.ch.NioSocketImpl$1.read(NioSocketImpl.java:803)

at java.base/java.net.Socket$SocketInputStream.read(Socket.java:966)

at java.base/sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:270)

at java.base/sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:313)

at java.base/sun.nio.cs.StreamDecoder.read(StreamDecoder.java:188)

at java.base/java.io.InputStreamReader.read(InputStreamReader.java:177)

at java.base/java.io.BufferedReader.fill(BufferedReader.java:162)

at java.base/java.io.BufferedReader.read(BufferedReader.java:183)

at star.base.neo.NeoProperty.readNextChar(NeoProperty.java:894)

at star.base.neo.NeoProperty.input(NeoProperty.java:673)

[catch] at star.base.neo.ClientNotifyHandler.run(ClientNotifyHandler.java:456)

at java.base/java.lang.Thread.run(Thread.java:833)

Answer 1

[Debadipto]

Hi @Marina,

It seems like the issue you're encountering might stem from problems with network stability. Please make sure your network connection is reliable. Additionally, if your simulations are running across multiple machines, verify that no firewall or network security configurations are disrupting the communication.

If the situation persists, consider reaching out to the MathWorks Technical Support for assistance:

https://www.mathworks.com/support/contact_us.html

[Marina Espejo]

Hi,

thanks for your reply. I've read in StarCCM+ documents that it may show that message when the problem is completely different.

I think that it may be something related to this other message:

WARNING: This FMU model not support restart functionality. An attempt will be made to export the tracked values, but correct behavior is not guaranteed

INFO: Processing event 'Terminate FMU'

Do you know something about the restart functionality?

Thanks in advance