Pai,
can you come up with a small, self-contained testcase? This indeed looks like 
a bug somewhere.

I looked at the code you are calling, but it seems correct to me -- it may be 
that the error is in Trilinos, but it's hard to tell without a code we can 
play with.

Best
  W.


On 10/28/19 6:03 PM, Pai Liu wrote:
> Hi all,
> 
> I need to manually create a trilinos sparse matrix (which a rectangular 
> matrix 
> here) and setup the entries of this matrix.
> 
> When I do this with the following codes on one MPI rank:
> 
> 
> TrilinosWrappers::SparseMatrix T_mat(
>              locally_owned_dofs_DG, locally_owned_dofs_NdRho, MPI_COMM_WORLD, 
> 8);
> 
> 
> TrilinosScalar val = 2.;
> T_mat.add(0, 0, val);
> 
> 
> *I got the follow error:*
> 
> An error occurred in line <1824> of file 
> </home/pai/deal.ii-candi/tmp/unpack/deal.II-v9.1.1/source/lac/trilinos_sparse_matrix.cc>
>  
> in function
>      void 
> dealii::TrilinosWrappers::SparseMatrix::add(dealii::TrilinosWrappers::SparseMatrix::size_type,
>  
> dealii::TrilinosWrappers::SparseMatrix::size_type, const size_type*, const 
> TrilinosScalar*, bool, bool)
> The violated condition was:
>      ierr == 0
> Additional information:
>      An error with error number 2 occurred while calling a Trilinos function
> 
> 
> As on one MPI rank, this matrix should have all the entries stroed. I dont 
> understand this error, and any help will be appreciated.
> 
> Thank you.
> 
> 
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-- 
------------------------------------------------------------------------
Wolfgang Bangerth          email:                 [email protected]
                            www: http://www.math.colostate.edu/~bangerth/

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