Question: Why is executeCoupling() commented out in olbMixing.hh?

[SiyonaAgarwa]

Hi! I was going through olbMixing.hh in the CFD handlers and noticed that this line is commented out:

// this->getLattice().executeCoupling();

Here’s the surrounding loop for context:

for (int iT = 0; iT < int(maxIter); ++iT) {
    writeVTK(this->getStep());
    for (auto& [speciesId, adLattice] : adLattices) {
        // this->getLattice().executeCoupling();
        adLattice->collideAndStream();
        adConverges.at(speciesId)->takeValue(
            adLattice->getStatistics().getAverageRho(), true
        );
    }
    this->getStep() += 1;
}

When I tried running the simulation, I needed to uncomment executeCoupling() for it to work correctly on my end.

Also, I wanted to ask about the concentration-related CFD examples. They are not working for me out of the box. When I tried running them, I encountered the following error:

terminate called after throwing an instance of 'std::invalid_argument'
what(): Continuous simulations are currently not supported for this platform.

I had to modify/write additional code to get them running properly.

Could you please clarify:

• Is executeCoupling() intentionally commented out (e.g., for specific workflows or solver configurations)?
• Why are the concentration examples not working as expected?
• Is the above error related to platform limitations or missing configuration?

Just want to make sure I’m not missing something before proceeding further. Thanks!