[Trilinos-Users] [EXTERNAL] Re: MueLu + Belos + Epetra Runtime Error

[Klinvex, Alicia Marie]

Hello MueLu developers,

Does the MueLu preconditioner get applied with Apply or ApplyInverse?  Should Shilei wrap the preconditioner in an Epetra_InvOperator before passing it to Belos (so that Apply and ApplyInverse get swapped)?

Thanks,
Alicia

From: Trilinos-Users [mailto:trilinos-users-bounces at trilinos.org] On Behalf Of Lin, Shilei
Sent: Saturday, February 18, 2017 5:35 PM
To: trilinos-users at trilinos.org
Subject: [EXTERNAL] Re: [Trilinos-Users] MueLu + Belos + Epetra Runtime Error


Here is the Code.

________________________________
From: Lin, Shilei
Sent: Saturday, February 18, 2017 4:33:45 PM
To: trilinos-users at trilinos.org<mailto:trilinos-users at trilinos.org>
Subject: MueLu + Belos + Epetra Runtime Error


Dear developers / Users,

I am try to modify an example code from the MueLu packages. I have attahed my source code. The code will compile, however, it won't work when I set the Preconditioner to the Belos linear problem.

In line 152:   //Problem->setLeftPrec(M);

This is the error message from runtime:

terminate called after throwing an instance of 'Belos::EpetraOpFailure'
  what():  /home/shilei/Documents/Source/Trilinos/packages/belos/epetra/src/BelosEpetraAdapter.cpp:816:

Throw number = 1

Throw test that evaluated to true: info != 0

Belos::OperatorTraits::Apply (Epetra specialization): Calling the Epetra_Operator object's Apply() method failed, returning a nonzero error code of -1.


When I disabled preconditioner, the programm actually works.
Also, I can not find an example for using Belos as solver and MueLu as preconditioner with Epetra.
Thanks!
Shilei Lin


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