"Klinvex, Alicia Marie" <[email protected]> writes: > ISLocalToGlobalMapping PETScRowOwnership, PETScColOwnership; > > ierr = MatGetLocalToGlobalMapping(A, &PETScRowOwnership, > &PETScColOwnership); CHKERRV(ierr);
It appears that the local-to-global mapping has not been set. Note that these mappings do not signify "ownership", but rather a map from an (overlapping) local index space to the non-overlapping global index space. Perhaps you would like MatGetOwnershipRange(s)?
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