[ML] Identity matrix generated in ML hierarchy
Created by: dlkarnit
We have run into a case where ML prints:
"ERROR: Amesos NumericFactorization failed... dumping relevant matrix for post-mortem"
We've identified that the exported matrix is the identity matrix. We believe that this has occured in some level of the multigrid-hierarchy for a ML_Epetra::MultiLevelPreconditioner, but have not yet identified which level.
We are using the AztecOO solver with BiCGStab to solve our system. The solution does converge even when this message is printed so we do not suspect there are any structural or numerical issues in the matrix, but we have not confirmed this yet.
Any help in diagnosing how we can prevent this issue in the future is much appreciated!