Asynchronous co-simulation does not work

[tsadowski]

I try to build an asynchronous FMU for FMI 2.

I return fmi2Pending in fmi2DoStep. I would expect fmusim to poll fmi2GetStatus but the simulation simply terminates.

Am I doing something wrong or should I simply modify fmusim?

Cheers,
Torsten

[pmai]

As you found out, fmusim does not support asynchronous FMUs, hence errors out. So if you really need that, you would have to extend fmusim.

However I would question whether creating an asynchronous FMU really makes sense in the first place: This feature of FMI 1/2 was really not supported by most implementations, and there is also little use for it, as a simulator/FMU that wants concurrency can handle that better via common platform functionalities. This is also the reason that FMI 3 dropped this feature completely.

So given that state of affairs, I would try to figure out what you are really trying to achieve and persue it via an alternative possibility, rather than trying to make asynchronous FMU work.