dolfin team mailing list archive

[Anders Logg <logg@xxxxxxxxx>]

On Tue, Nov 27, 2007 at 04:30:43PM +0100, Thomas Witkowski wrote:
> Hi,
> 
> I want to use dolfin for solving eigenvalue problems. I've installed 
> dolfin 0.7.1 with petsc and slepc. The matrix, for which the eigenvalues 
> should be computed, is defined in the following way:
> 
> PETScMatrix C(TS, TS);
> C.set(.....);
> C.set(.....);

Try calling

  C.apply();

after the set functions.

PETSc needs to "assemble" the changes you made when calling set()
before you can do anything with the matrix.

-- 
Anders


> Now, when I'm trying to solve the problem with:
> 
>  SLEPcEigenvalueSolver esolver;
>  esolver.solve(C);
> 
> I get the following error message:
> 
> 
> [0]PETSC ERROR: --------------------- Error Message 
> ------------------------------------
> [0]PETSC ERROR: Object is in wrong state!
> [0]PETSC ERROR: Not for unassembled matrix!
> [0]PETSC ERROR: 
> ------------------------------------------------------------------------
> [0]PETSC ERROR: Petsc Release Version 2.3.3, Patch 8, Fri Nov 16 
> 17:03:40 CST 2007 HG revision: 414581156e67e55c761739b0deb119f7590d0f4b
> [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: ./mass on a linux-gnu named ... by witkowsk Tue Nov 27 
> 16:17:51 2007
> [0]PETSC ERROR: Libraries linked from 
> /u/witkowski/local/petsc-2.3.3-p8/lib/linux-gnu-cxx
> [0]PETSC ERROR: Configure run at Tue Nov 27 11:24:27 2007
> [0]PETSC ERROR: Configure options --with-mpi-dir=/u/witkowski/local 
> --with-clanguage=cxx --download-hypre=yes --with-hypre=1 
> --download-umfpack=yes --with-umfpack=1 --with-shared=0
> [0]PETSC ERROR: 
> ------------------------------------------------------------------------
> [0]PETSC ERROR: MatMult() line 1616 in src/mat/interface/matrix.c
> [0]PETSC ERROR: STApply_Shift() line 30 in src/st/impls/shift/shift.c
> [0]PETSC ERROR: STApply() line 49 in src/st/interface/stsolve.c
> [0]PETSC ERROR: EPSBasicArnoldi() line 86 in src/eps/impls/arnoldi/arnoldi.c
> [0]PETSC ERROR: EPSSolve_KRYLOVSCHUR() line 91 in 
> src/eps/impls/krylovschur/krylovschur.c
> [0]PETSC ERROR: EPSSolve() line 71 in src/eps/interface/solve.c
> Eigenvalue solver (krylovschur) converged in 1 iterations.
> 
> 
> What does it meen? And what have I made wrong?
> 
> Regards,
> 
> Thomas
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