Thank you guys for the tips.
Longmmin On Tue, May 31, 2011 at 1:38 AM, Jed Brown <jed at 59a2.org> wrote: > On Tue, May 31, 2011 at 01:31, Matthew Knepley <knepley at gmail.com> wrote: > >> You generate a NaN somewhere. I usually check for this using norms, since >> NaN propagate. Check the norm >> of the rhs, initial solution, matrix, etc. >> > > You can also run with -fp_trap, possibly in a debugger, and it should break > at the first place the NaN was computed. This works better (on more > platforms) with petsc-dev. > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20110531/b7579d70/attachment.htm>
