[petsc-users] matrix-free KSPLSQR and matrix norm

[Alexander Grayver]

Hello!

I'm using matrix-free formulation and KSPLSQR to solve normal equations 
system:

(A'*A)b = -g

I managed to write all necessary code:

   call MatCreateShell(MPI_COMM_WORLD,m,N,N,N,PETSC_NULL_INTEGER,H,ierr)
   call MatShellSetOperation(H,MATOP_MULT,MFMatMult,ierr)

   call KSPCreate(MPI_COMM_WORLD,ksp,ierr);CHKERRQ(ierr)
   call KSPSetType(ksp,KSPLSQR,ierr);CHKERRQ(ierr)
   call KSPGetPC(ksp,pc,ierr);CHKERRQ(ierr)
   call PCSetType(pc,PCNONE,ierr);CHKERRQ(ierr)
   call 
KSPSetOperators(ksp,H,PETSC_NULL_OBJECT,SAME_PRECONDITIONER,ierr);CHKERRQ(ierr)
   call KSPSolve(ksp,g,b,ierr);CHKERRQ(ierr)


  but fail in KSPSolve stage with that:
[0]PETSC ERROR: --------------------- Error Message 
----------------------------
--------
[0]PETSC ERROR: Object is in wrong state!
[0]PETSC ERROR: Mat object's type is not set: Argument # 1!
[0]PETSC ERROR: 
----------------------------------------------------------------
--------
[0]PETSC ERROR: Petsc Release Version 3.1.0, Patch 7, Mon Dec 20 
14:26:37 CST 20
10
[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.
[0]PETSC ERROR: 
----------------------------------------------------------------
--------
[0]PETSC ERROR: D:\mt-soft\multiem\INV3D\INV3Dwin\x64\debug\em3d.exe on 
a cygwin
-cx named MT0. by Unknown Mon Jun 27 16:18:43 2011
[0]PETSC ERROR: Libraries linked from 
/cygdrive/d/dev/petsc-3.1-p7/cygwin-cxx-de
bug/lib
[0]PETSC ERROR: Configure run at Fri Mar  4 10:10:06 2011
[0]PETSC ERROR: Configure options --with-cc="win32fe cl" 
--with-fc="win32fe ifor
t" --with-cxx="win32fe cl" --with-windows-graphics=0 
--download-f-blas-lapack=1
--with-precision=double --with-scalar-type=complex --with-clanguage=cxx 
--with-m
pi-include=/cygdrive/d/Dev/HPC_2008_SDK/Include 
--with-mpi-lib="[/cygdrive/d/Dev
/HPC_2008_SDK/Lib/amd64/msmpi.lib,/cygdrive/d/Dev/HPC_2008_SDK/Lib/amd64/msmpife
c.lib]" --useThreads=0 --useThreads=0
[0]PETSC ERROR: 
----------------------------------------------------------------
--------
[0]PETSC ERROR: MatNorm() line 4507 in 
src/mat/interface/D:\dev\PETSC-3.1-P\src\mat\INTERF~1\matrix.c
[0]PETSC ERROR: KSPSolve_LSQR() line 90 in 
src/ksp/ksp/impls/lsqr/D:\dev\PETSC-3.1-P\src\ksp\ksp\impls\lsqr\lsqr.c

Any suggestions? Do I have to set MATOP_NORM operation? Then how?

Regards,
Alexander