[petsc-users] options for gmres w/ ilu precondioner for sparse

[Michael E Henderson]

Good morning,

I'm trying to use gmres with an ilu preconditioner and having trouble 
getting the options right. I figure it's got to be something simple, so 
hope it's an easy question.

With options:

-ksp_type gmres
-pc_type ilu
-pc_factor_levels 10
-pc_factor_fill 10
-pc_factor_mat_solver_package spai

I get the message:

 unknown: [1|MatGetFactor() line 3646 in src/mat/interface/matrix.c: 
Matrix format mpiaij does not have a solver spai. Perhaps you must 
config/configure.py with --download-spai

I checked the configuration output and spai was indeed configured and 
built. I also tried spooles with a similar result.

The table 
http://www.mcs.anl.gov/petsc/petsc-as/documentation/linearsolvertable.html 
seems to be saying that only hypre/euclid can be used for ilu(k) w/ aij. 
Is that true?

-pc_factor_mat_solver_package hypre 
-pc_hypre_type euclid

also gives

unknown: [1MatGetFactor() line 3646 in src/mat/interface/matrix.c: Matrix 
format mpiaij does not have a solver hypre. Perhaps you must 
config/configure.py with --download-hypre 

I'm using hypre as a preconditioer elsewhere, so I'm sure it's installed. 
Am I doing something obviously wrong?

Thanks,

Mike Henderson
------------------------------------------------------------------------------------------------------------------------------------
Mathematical Sciences, TJ Watson Research Center
mhender at watson.ibm.com
http://www.research.ibm.com/people/h/henderson/
http://multifario.sourceforge.net/
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