[petsc-users] MatMatMult Question

[Hong Zhang]

Nachiket :

Which version of petsc is used? Did you run the code in sequential?

> ------------------------------------
> [0]PETSC ERROR: Arguments are incompatible!
> [0]PETSC ERROR: MatMatMult requires A, seqdense, to be compatible with B,
> seqdense!
[0]PETSC ERROR: MatMatMult() line 8601 in
/opt/petsc/petsc-3.3-p2/src/mat/interface/matrix.c

The line (8601) does not match the latest petsc-3.3 and petsc-dev.
I cannot reproduce this error from the latest petsc-3.3 and petsc-dev.

The error complains about a failure to find MatMatMult_SeqDense_SeqDense().
Can you update to the latest petsc-3.3 or petsc-dev and see if your
code still crashes?

Hong

> I am trying to multiply the transpose of a matrix with another matrix using
> matmatmult.  The transpose operator is created using MatTranspose. I get the
> error at the end of the email. Is this an error saying that cols of matrix 1
> and not equal to the rows of matrix 2? I checked and the rows and columns
> seem to allow matrix multiplication: Left = (54,1760), Right=(1760,54).  The
> snipped of the code which produces this is
>
>   ierr =
> MatMatMult(*KFullMat,ProjR,MAT_INITIAL_MATRIX,PETSC_DEFAULT,&TempMat);CHKERRQ(ierr);
>   ierr = MatGetSize(ProjLT,&nrowl,&ncoll); CHKERRQ(ierr);
>   ierr = MatGetSize(TempMat,&nrowr,&ncolr); CHKERRQ(ierr);
>   ierr = PetscPrintf(PETSC_COMM_WORLD,"Left = (%d,%d),
> Right=(%d,%d)\n",nrowl,ncoll,nrowr,ncolr); CHKERRQ(ierr);
>   ierr = MatMatMult(ProjLT,TempMat,MAT_INITIAL_MATRIX,PETSC_DEFAULT,&KProj);
> CHKERRQ(ierr);
>   ierr = MatDestroy(&TempMat);
>
> Thanks,
>
> -Nachiket
>
> [0]PETSC ERROR: --------------------- Error Message
> ------------------------------------
> [0]PETSC ERROR: Arguments are incompatible!
> [0]PETSC ERROR: MatMatMult requires A, seqdense, to be compatible with B,
> seqdense!
> [0]PETSC ERROR:
> ------------------------------------------------------------------------
> [0]PETSC ERROR: Petsc Release Version 3.3.0, Patch 2, Fri Jul 13 15:42:00
> CDT 2012
> [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: /home/gokhale/WAIGEN/GDEB-WAIGEN2012/bin/waigen on a
> linux-gcc named asd1.wai.com by gokhale Mon Dec 17 16:58:13 2012
> [0]PETSC ERROR: Libraries linked from
> /opt/petsc/petsc-3.3-p2/linux-gcc-g++-mpich-mumps-complex-debug/lib
> [0]PETSC ERROR: Configure run at Mon Oct 29 18:41:24 2012
> [0]PETSC ERROR: Configure options --with-x=0 --with-mpi=1
> --download-mpich=yes --with-x11=0 --with-debugging=1 --with-clanguage=C++
> --with-shared-libraries=1 --download-mumps=yes --download-f-blas-lapack=1
> --download-parmetis=1 --download-metis --download-scalapack=1
> --download-blacs=1 --with-cmake=/usr/bin/cmake28 --with-scalar-type=complex
> [0]PETSC ERROR:
> ------------------------------------------------------------------------
> [0]PETSC ERROR: MatMatMult() line 8601 in
> /opt/petsc/petsc-3.3-p2/src/mat/interface/matrix.c
> [0]PETSC ERROR: waigensolvprojforc() line 33 in
> src/examples/waigensolvprojforc.c
>