Is TransiEnt compatible with OpenModelica in 2024 and beyond?

[wangzizhe]

Hi, since in the description it is written:

Currently, only Dymola provides full suppport of TransiEnt. The development team has tested all models carefully using Dymola 2022x.

Can I use TransiEnt in OpenModelica? Will I get some problems?

Vielen Dank im Voraus!
Viele Grüße

[annehage]

Hi @wangzizhe,
unfortunately, the TransiEnt library is not yet compatible with OpenModelica, although we would like to work on that in the longterm. The TransiEnt library is based on the ClaRa library which is currently also not working with OM. There is a team working on the OM compatibility of the ClaRa library and the remaining issues will hopefully be solved soon. Once this is done, we will start working on the TransiEnt to make it OM compatible but we cannot give an estimation as to when it will be achieved, since we don’t know yet the extend of the changes that will need to be undertaken.

[JakeI]

Is this still up-to-date?

Note that the latest release of ClaRa should support OpenModelica (see their release notes)

[wangzizhe]

Hi @JakeI,

the current version of the TransiEnt is based on the ClaRa 1.8.1, on the release note I saw that only since Clara 1.8.2 it supports most of model for OpenModelica. So I guess still until today TransiEnt is not compatible with OpenModelica.

[JakeI]

Hi @wangzizhe

thank you for the clarification. That's precisely what I thought.

However, what are the future planes for TransiEnt as a project?

• Is there any plan to upgrade to ClaRa 1.8.2?
• If so, when? Given that ClaRa just changed its minor version, it sounds like an upgrade might be fairly quick and straight forward.
• Would an upgrade of ClaRa make TransiEnt OpenModelica compatible? Or does any part of TransiEnt itself rely on Dymola specific features?

From my perspective, requiring a Dymola license is the one big issue with this library. That's why I'm very excited about potential OpenModelica compatibility.

[wangzizhe]

Hi @JakeI,

there is a "OpenModelica Library Coverage Testing" repo. From the result (https://libraries.openmodelica.org/branches/overview.html) I can see that the coverage testing's result of ClaRa and TransiEnt is different.

(Ideally the number of Parsing, Frontend, Backend, SimCode, Templates, Compilation, Simulation, Verification should be the same and there is no yellow color in the result. It means that library is totally compatible with OpenModelica).

So I assume even though ClaRa becomes compatible with OM, there should be some modifications down to TransiEnt. But I'm not sure, I have the same question as you. Now I reopen this issue and wait for the development team's answer.

@annehage Could you please provide some information?

Thanks!