The error is:
Linear Elasticity_ solve did not converge due to DIVERGED_PCSETUP_FAILED
iterations 0
PCSETUP_FAILED due to FACTOR_NOERROR
The program actually continues, Is there any way I can catch this divergence
and do some operation like writing to disk?
Thanks
Miguel
________________________________
From: Jed Brown <[email protected]>
Sent: Saturday, November 11, 2017 1:43:32 PM
To: Salazar De Troya, Miguel; [email protected]
Subject: Re: [Libmesh-users] try-catch in a PETSc solve()
What is your error message? If the error is raised in PETSc, there is
usually a setting to make it return without raising an error (instead
setting a "diverged" reason).
"Salazar De Troya, Miguel" <[email protected]> writes:
> Hello
>
>
> I have an optimization problem for which at a certain iteration, PETSc fails
> to build the preconditioner. I would like to catch that error and print my
> EquationSystem to disk so I can rerun the PETSc solve at that optimization
> iteration from the start. I cannot just rerun my optimization and write to
> disk at the iteration I know it is going to fail. The reason is that in
> parallel the optimization slightly differs every time I run it so the
> iteration it is going to fail at keeps changing. Maybe something along this
> lines:
>
>
> try{
>
> system.solve()
>
> }
>
> catch(...){
>
> EquationSystem & es = system.get_equation_systems();
>
> es.write("eq_output.xdr")
>
> }
>
>
> Thanks
>
> Miguel
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