<html><head><meta http-equiv="content-type" content="text/html; charset=us-ascii"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div><br></div> You are not missing anything. The petsc4py stub for SNESNASMSetSubdomains() has not been written. You could add it by adding to<div><p style="margin: 0px; font-style: normal; font-variant-caps: normal; font-stretch: normal; line-height: normal; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;"><span style="font-variant-ligatures: no-common-ligatures;">src/petsc4py/PETSc/SNES.pyx and </span>src/petsc4py/PETSc/petscsnes.pxi and then make a merge request <a href="https://petsc.org/release/developers/contributing/">https://petsc.org/release/developers/contributing/</a> to get it into PETSc.</p><div><br><blockquote type="cite"><div>On Jun 22, 2023, at 1:54 PM, Karin&NiKo <niko.karin@gmail.com> wrote:</div><br class="Apple-interchange-newline"><div><div dir="ltr">Dear PETSc team,<div><br></div><div>I would like to play with aspin-type nonlinear solvers. I have found several tests like snes/tutorials/ex19.c but they all use DA, which I don't want to use since I need to stick at the algebraic level.</div><div>Then, I started looking at petsc4py/demo/ode/heat.py and tried to set up things.</div><div>Unfortunately, I get the error "DM has no default decomposition defined. Set subsolves manually with SNESNASMSetSubdomains()" which, I think, I do understand.</div><div>But I do not find any implementation of the SNESNASMSetSubdomains in petsc4py. </div><div>Am I missing something ? </div><div>Thanks,</div><div>Nicolas</div></div>
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