I am now getting this error, which is complaining for an operation for the 
shell matrix. I have only specified the following operation for the matrix: 
“MATOP_MULT”.

I am calling the solver with -pc_type fieldsplit.

What can I do to move forward with the solution? 

Thanks,
Manav
 

[1;31m[0]PETSC ERROR: --------------------- Error Message 
--------------------------------------------------------------
[0;39m[0;49m[0]PETSC ERROR: No support for this operation for this object type
[0]PETSC ERROR: Mat type shell
[0]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html for 
trouble shooting.
[0]PETSC ERROR: Petsc Release Version 3.7.4, Oct, 02, 2016 
[0]PETSC ERROR: 
/Users/manav/Library/Developer/Xcode/DerivedData/MAST-crggwcqrouiyeucduvscdahjauvx/Build/Products/Debug/examples
 on a arch-darwin-cxx-opt named Blackbird.local by manav Sat Feb 11 11:17:44 
2017
[0]PETSC ERROR: Configure options 
--prefix=/Users/manav/Documents/codes/numerical_lib/petsc/petsc-3.7.4/../ 
--CC=mpicc-openmpi-clang38 --CXX=mpicxx-openmpi-clang38 
--FC=mpif90-openmpi-clang38 --with-clanguage=c++ --with-fortran=0 
--with-mpiexec=/opt/local/bin/mpiexec-openmpi-clang38 --with-shared-libraries=1 
--with-x=1 --with-x-dir=/opt/X11 --with-debugging=0 
--with-lapack-lib=/usr/lib/liblapack.dylib 
--with-blas-lib=/usr/lib/libblas.dylib --download-superlu=yes 
--download-superlu_dist=yes --download-suitesparse=yes --download-mumps=yes 
--download-scalapack=yes --download-parmetis=yes --download-metis=yes 
--download-hypre=yes --download-ml=yes
[0]PETSC ERROR: #1 MatMultTransposeAdd() line 2486 in 
/Users/manav/Documents/codes/numerical_lib/petsc/petsc-3.7.4/src/mat/interface/matrix.c
[0]PETSC ERROR: #2 MatMultTranspose_Nest() line 109 in 
/Users/manav/Documents/codes/numerical_lib/petsc/petsc-3.7.4/src/mat/impls/nest/matnest.c
[0]PETSC ERROR: #3 MatMultTranspose() line 2320 in 
/Users/manav/Documents/codes/numerical_lib/petsc/petsc-3.7.4/src/mat/interface/matrix.c
[0]PETSC ERROR: #4 SNESNEWTONLSCheckLocalMin_Private() line 25 in 
/Users/manav/Documents/codes/numerical_lib/petsc/petsc-3.7.4/src/snes/impls/ls/ls.c
[0]PETSC ERROR: #5 SNESSolve_NEWTONLS() line 259 in 
/Users/manav/Documents/codes/numerical_lib/petsc/petsc-3.7.4/src/snes/impls/ls/ls.c
[0]PETSC ERROR: #6 SNESSolve() line 4005 in 
/Users/manav/Documents/codes/numerical_lib/petsc/petsc-3.7.4/src/snes/interface/snes.c



> On Feb 9, 2017, at 11:29 AM, Barry Smith <bsm...@mcs.anl.gov> wrote:
> 
> 
>> On Feb 8, 2017, at 11:39 PM, Dave May <dave.mayhe...@gmail.com> wrote:
>> 
>> Any time you modify one of the submats, you need to call assembly begin/end 
>> on that sub matrix AND on the outer matnest object.
> 
>   Weird, and prone to errors it seems to me. Perhaps this needs to be 
> rethought
> 
>> 
>> Thanks,
>>  Dave
>> 
>> 
>> On Wed, 8 Feb 2017 at 22:51, Manav Bhatia <bhatiama...@gmail.com> wrote:
>> aha.. that might be it.
>> 
>> Does that need to be called for the global matrix after each assembly of the 
>> Jacobian blocks, or just once for the whole matrix?
>> 
>> -Manav
>> 
>>> On Feb 8, 2017, at 3:47 PM, Barry Smith <bsm...@mcs.anl.gov> wrote:
>>> 
>>> 
>>>> On Feb 8, 2017, at 3:40 PM, Manav Bhatia <bhatiama...@gmail.com> wrote:
>>>> 
>>>> Hi,
>>>> 
>>>>  I have a nested matrix with 2x2 blocks. The blocks (1,1) and (2,2) are 
>>>> AIJ matrices and blocks (1,2) and (2,1) and shell matrices. I am calling 
>>>> the code with the following arguments: -pc_type fieldsplit , and get the 
>>>> error shown below.
>>>> 
>>>>  I see that the error is complaining about the matrix being in unassembled 
>>>> state, but I think I am initializing and calling assembly end routines on 
>>>> both the diagonal blocks. Still, there is something obvious I am missing.
>>> 
>>> It is complaining about the outer most matrix, not the blocks. Perhaps you 
>>> haven't finished with setting up your nest matrix?
>>> 
>>>> 
>>>>  I would appreciate any guidance on this.
>>>> 
>>>> Regards,
>>>> Manav
>>>> 
>>>> 
>>>> 
>>>> [1;31m[0]PETSC ERROR: --------------------- Error Message 
>>>> --------------------------------------------------------------
>>>> [0;39m[0;49m[0]PETSC ERROR: Object is in wrong state
>>>> [0]PETSC ERROR: Not for unassembled matrix
>>>> [0]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html 
>>>> for trouble shooting.
>>>> [0]PETSC ERROR: Petsc Release Version 3.7.4, Oct, 02, 2016
>>>> [0]PETSC ERROR: 
>>>> /Users/manav/Library/Developer/Xcode/DerivedData/MAST-crggwcqrouiyeucduvscdahjauvx/Build/Products/Debug/examples
>>>>  on a arch-darwin-cxx-opt named Dhcp-90-250.HPC.MsState.Edu by manav Wed 
>>>> Feb  8 15:28:04 2017
>>>> [0]PETSC ERROR: Configure options 
>>>> --prefix=/Users/manav/Documents/codes/numerical_lib/petsc/petsc-3.7.4/../ 
>>>> --CC=mpicc-openmpi-clang38 --CXX=mpicxx-openmpi-clang38 
>>>> --FC=mpif90-openmpi-clang38 --with-clanguage=c++ --with-fortran=0 
>>>> --with-mpiexec=/opt/local/bin/mpiexec-openmpi-clang38 
>>>> --with-shared-libraries=1 --with-x=1 --with-x-dir=/opt/X11 
>>>> --with-debugging=0 --with-lapack-lib=/usr/lib/liblapack.dylib 
>>>> --with-blas-lib=/usr/lib/libblas.dylib --download-superlu=yes 
>>>> --download-superlu_dist=yes --download-suitesparse=yes 
>>>> --download-mumps=yes --download-scalapack=yes --download-parmetis=yes 
>>>> --download-metis=yes --download-hypre=yes --download-ml=yes
>>>> [0]PETSC ERROR: #1 MatMult() line 2248 in 
>>>> /Users/manav/Documents/codes/numerical_lib/petsc/petsc-3.7.4/src/mat/interface/matrix.c
>>>> [0]PETSC ERROR: #2 PCApplyBAorAB() line 717 in 
>>>> /Users/manav/Documents/codes/numerical_lib/petsc/petsc-3.7.4/src/ksp/pc/interface/precon.c
>>>> [0]PETSC ERROR: #3 KSP_PCApplyBAorAB() line 274 in 
>>>> /Users/manav/Documents/codes/numerical_lib/petsc/petsc-3.7.4/include/petsc/private/kspimpl.h
>>>> [0]PETSC ERROR: #4 KSPGMRESCycle() line 156 in 
>>>> /Users/manav/Documents/codes/numerical_lib/petsc/petsc-3.7.4/src/ksp/ksp/impls/gmres/gmres.c
>>>> [0]PETSC ERROR: #5 KSPSolve_GMRES() line 240 in 
>>>> /Users/manav/Documents/codes/numerical_lib/petsc/petsc-3.7.4/src/ksp/ksp/impls/gmres/gmres.c
>>>> [0]PETSC ERROR: #6 KSPSolve() line 656 in 
>>>> /Users/manav/Documents/codes/numerical_lib/petsc/petsc-3.7.4/src/ksp/ksp/interface/itfunc.c
>>>> [0]PETSC ERROR: #7 SNESSolve_NEWTONLS() line 230 in 
>>>> /Users/manav/Documents/codes/numerical_lib/petsc/petsc-3.7.4/src/snes/impls/ls/ls.c
>>>> [0]PETSC ERROR: #8 SNESSolve() line 4005 in 
>>>> /Users/manav/Documents/codes/numerical_lib/petsc/petsc-3.7.4/src/snes/interface/snes.c
>>>> 
>>> 
>> 
> 

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