Hello everyone, I am trying different number of da_overlap to see its effects on nasm and aspin preconditioner. The codes works fine with -da_overlap 0. However, when I change the option -da_overlap 1, it crashed with the error message like "zero pivot row 12544 value 0 tolerance 2.2e-14". The option -pc_factor_nonzeros_along_diagonal does not fix this zero pivot issue.
Do you have any quick suggestions for me to try to fix this issue? Thank you. Best, Xiangdong
