Read matrix

[Tim Kröger <tim@xxxxxxxxxxxxxxxxxxx>]

Dear all,

I am assembling a matrix using several calls to MatSetValues(). 
Then, I call MatAssemblyBegin() and MatAssemblyEnd() as usual.  After 
that, I would like to write the complete matrix into a file (for 
debugging purposes).  My idea was to call MatGetRow() for each matrix 
row and write the values out.  This seems to work in one-processor 
mode, but in parallel, I get

[14]PETSC ERROR: MatGetRow_MPIAIJ() line 1185 in src/mat/impls/aij/mpi/mpiaij.c
[14]PETSC ERROR: Object is in wrong state!
[14]PETSC ERROR: Already active!
[14]PETSC ERROR: MatGetRow() line 106 in src/mat/interface/matrix.c

What did I do wrong?

Best Regards,

Tim

--
Dr. Tim Kroeger                            Phone +49-421-218-7710
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