[Trilinos-Users] Ifpack_Preconditioner

[Bora Ucar]

Hi,

I am constructing ILUT preconditioner using the lines
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/*Matrix SC is already fillcomplete'd*/

OverlapLevel = 0;
List.set("fact: drop tolerance", 1e-3);
Ifpack_Preconditioner *BJforSC;
BJforSC = new Ifpack_AdditiveSchwarz<Ifpack_ILUT>(SC, OverlapLevel);
BJforSC->SetParameters(List);
BJforSC->Initialize();
BJforSC->Compute();

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I need to access to number of nonzeros in the approximate factors L and U.

Ifpack manual (SAND2005-0662) says the lines

Ifpack_ILUT* Inverse = BJforSC->Inverse();
const Epetra_CrsMatrix& L = Inverse->L();

should work.

But, I got the following compilation error
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proPre.cpp: In constructor `proPre::proPre(Epetra_CrsMatrix&,
   Epetra_CrsMatrix&, const Epetra_Comm&, const Epetra_Map&)':
proPre.cpp:71: no matching function for call to `Ifpack_Preconditioner::Inverse
   ()'
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The file proPre.cpp: includes

#include "Ifpack_config.h"
#include "Ifpack_ConfigDefs.h"
#include "Ifpack.h"
#include "Ifpack_AdditiveSchwarz.h"
#include "Ifpack_ILUT.h"
#include "Ifpack_Preconditioner.h"

Can you see any problems?