On 2/1/24 14:50, Alex Quinlan wrote:
Can anyone see where I may have gone wrong or what I have omitted?
Alex:
I cannot see what the issue is, and I doubt anyone can without spending a
substantial amount of time debugging. I am slightly confused, though, by the
error message. I *believe* that what it is saying is that you are trying to
write into a matrix entry that is not part of the matrix -- you can only write
into matrix entries you have previously said exist when you passed the
sparsity pattern to the matrix. So what you need to find out is who owns row
36, and whether the sparsity pattern you provided on that process included
entry (36,48). My best guess is that that entry was not present in the
sparsity pattern on the process that owns row 36, and then your goal needs to
be to figure out why not -- in other words, why you did not foresee that the
entry that you ultimately end up writing into was not included when you
constructed the sparsity pattern.
Best
W.
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Wolfgang Bangerth email: bange...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/
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