Thanks Barry
We were confused because the online manual says:
PETSc objects are always automatically initialized when declared so you do not
need to (and should not) do
type(tXXX) x = PETSC_NULL_XXX
XXX x = PETSC_NULL_XXX
Randy
> On Jul 4, 2025, at 6:56 PM, Barry Smith wrote:
>
>
>You
You need to pass PETSC_NULL_MAT in those locations, you cannot just pass a
Mat that has never been created (that is a different kind of NULL matrix :-). I
have added clearer error checking in
https://urldefense.us/v3/__https://gitlab.com/petsc/petsc/-/merge_requests/8526__;!!G_uCfscf7eWS!c7m
Yes, what specific ones are portable and fairly commonly needed? I would like
a default installation to include everything a user would need. So let me know
the list and I will add them.
Barry
> On Jul 3, 2025, at 8:07 PM, Zongze Yang wrote:
>
> Hi all,
>
> As PETSc can install Firedra
In the process of upgrading our code to version 3.23, we have run into another issue, this time with nest matrices.In previous versions (well to at least 3.21) it was perfectly fine to pass in null matrix blocks to create a nest matrix. There are situations where we have, for example, only diagonal
