[petsc-users] Fieldsplit and Fortran

[Jose E. Roman]

I would recommend trying in the development version (main branch) since it contains many fixes/changes to Fortran bindings. In particular, I think the issue you are reporting does not appear in main.

Jose


> El 15 sept 2025, a las 15:52, TARDIEU Nicolas via petsc-users <petsc-users at mcs.anl.gov> escribió:
> 
> Dear PETSc Team,
> I am having difficulty upgrading the interface of our code to the new Fortran API (I am currently using v3.23.6).
> For instance, I cannot find a Fortran example demonstrating how to use PCFieldSplitGetSubKSP. I have therefore modified ksp/ps/tests/ex9.F90 to demonstrate the issues I am facing.
> I have provided some explanations in the test, but I would like to highlight one key point: the splits are generated automatically in the code based on the user's preferences. Therefore, I need to dynamically create sub-KSPs that are stored in a dedicated data structure (this explains the manipulations I am trying to set up in the test).
> Regards,
> Nicolas
> --
> Nicolas Tardieu
> Ing PhD Computational Mechanics
> EDF - R&D Dpt ERMES
> PARIS-SACLAY, FRANCE
> 
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