On Tue, Dec 21, 2010 at 21:26, Vijay S. Mahadevan <vijay.m at gmail.com> wrote:
> 45 KSP preconditioned resid norm 2.511364148934e-07 true resid norm > 1.865039278877e+02 ||Ae||/||Ax|| 2.699481989705e+02 > The true residual is huge, this is not converging. You probably have a singular preconditioner. What are you using (-ksp_view) and what system are you solving with what discretization. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20101221/2f4d7c3a/attachment.htm>
