On 10/7/20 2:51 PM, Nikki Holtzer wrote:

When doing so I receive the following error:


An error occurred in line <195> of file <dealii-9.1.1/include/deal.II/lac/sparse_matrix.templates.h> in function

    dealii::SparseMatrix<Number>& dealii::SparseMatrix<number>::operator=(double) [with number = double]

The violated condition was:

     cols != nullptr

Additional information:

     (none)

You haven't associated a sparsity pattern with the sparse matrix yet. You'll have to set that first, and you need to make sure that it has an entry for each nonzero in the full matrix you are hoping to copy over!

Best
 W.


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Wolfgang Bangerth          email:                 bange...@colostate.edu
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