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I agree, in my lab our typical solution is a MATLAB/Python routine managing the simulations (submitting to a cluster, gathering the results, producing a report via LaTeX, changing some parameters, submitting again...) but these routines needs to be heavily customized for each project, version of the software, cluster, etc. and they always end being very fragile.

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Yes, I think the initial simulation definition/set up can be "easy", but once you get to parallel shared memory clusters it unfortunately have to be much more hands on. I had hoped to eventually not only allow running individual solvers from a single interface, but also allow coupling them similar to PreCICE [1], however making that easy to use is something I've not dared attempt yet.

[1]: https://www.precice.org

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