If you check ALL ERROR CODES by doing ierr = _AnyPetscCall_();CHKERRQ(ierr); The code will stop at the first error I see you are using openmp. Probably this is causing the problem, I don’t know what to say without a MWE. > On Feb 25, 2019, at 10:50 PM, Marius Buerkle <mbuerkle at web.de> wrote: > > <error_output.tar.gz>