[petsc-users] Test Jacobian

[Peter Brune]

Perhaps there might be a clue somewhere else in the message:

[0]PETSC ERROR: SNESTest aborts after Jacobian test!

All SNESTest does is compute the difference between the finite-difference
Jacobian and the user Jacobian (congratulations! yours isn't very
different!) and then aborts with the error that you have experienced here.

It may finally be time to excise SNESTest entirely as we have way better
alternatives now.  Anyone mind if I do that?  I'll make sure to update the
docs appropriately.

- Peter


On Tue, Apr 15, 2014 at 11:01 AM, Que Cat <quecat001 at gmail.com> wrote:

> Hello Petsc-users,
>
> I tested the hand-coded Jacobian, and received the follow error:
>
> Testing hand-coded Jacobian, if the ratio is
> O(1.e-8), the hand-coded Jacobian is probably correct.
> Run with -snes_test_display to show difference
> of hand-coded and finite difference Jacobian.
> Norm of matrix ratio 7.23832e-10 difference 1.39168e-07 (user-defined
> state)
> Norm of matrix ratio 1.15746e-08 difference 2.2254e-06 (constant state
> -1.0)
> Norm of matrix ratio 7.23832e-10 difference 1.39168e-07 (constant state
> 1.0)
> [0]PETSC ERROR: --------------------- Error Message
> ------------------------------------
> [0]PETSC ERROR: Object is in wrong state!
> [0]PETSC ERROR: SNESTest aborts after Jacobian test!
> [0]PETSC ERROR:
> ------------------------------------------------------------------------
> [0]PETSC ERROR: Petsc Release Version 3.4.3, Oct, 15, 2013
> [0]PETSC ERROR: See docs/changes/index.html for recent updates.
> [0]PETSC ERROR: See docs/faq.html for hints about trouble shooting.
> [0]PETSC ERROR: See docs/index.html for manual pages.
>
> What does "Object is in wrong state!" mean? What are the possible sources
> of this error? Thank you for your time.
>
> Que
>
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