[petsc-users] MatSetValue problem (in Fortran)

[Barry Smith]

  Are they then not using any preallocation? The "old dumb MatSetValues" used default preallocation. To reproduce that they can call MatXAIJSetPreallocation() with 10 and 3 as the local and nonlocal number of nonzeros per row. 

  Best to use -start_in_debugger or -on_error_attach_debugger to find the details of the crash



> On Oct 23, 2023, at 8:15 AM, Mark Adams <mfadams at lbl.gov> wrote:
> 
> I have a Fortran user that is getting a segv in MatSetValues_MPIAIJ in v3.19 and v3.20 and it works with v3.17. 
> They are trying to get a line number but I was thinking it might be worth trying the old dumb MatSetValues. 
> Is that possible?
> 
> Thanks,
> Mark