This time I used VectorOperation::insert and it didn't happen the memory error
that I posted before.
OK, so that then clearly helps :-)
However, if I put the compress function after the loop, it only sets one entry
on each rank then throws the exception
"Object is in wrong state, not for unassembled matrix."
Putting the compress() in the loop does not throw exceptions, instead, it
iterates forever.
So just as you said it is very inefficient and not an option.
I see. Yes, this is an effect of the PETSc memory model then. I'm not sure how
to solve this other than to not iterate over the entries of the matrix after
assembly :-(
Best
W.
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Wolfgang Bangerth email: [email protected]
www: http://www.math.colostate.edu/~bangerth/
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