Question #107349 on DOLFIN changed: https://answers.launchpad.net/dolfin/+question/107349
Anders Logg proposed the following answer: On Wed, Apr 14, 2010 at 11:50:36AM +0200, Anders Logg wrote: > On Wed, Apr 14, 2010 at 09:33:20AM -0000, Garth Wells wrote: > > Question #107349 on DOLFIN changed: > > https://answers.launchpad.net/dolfin/+question/107349 > > > > Garth Wells proposed the following answer: > > > > On 14/04/10 17:17, Anders Logg wrote: > > > On Wed, Apr 14, 2010 at 07:17:44AM -0000, bluejerry wrote: > > >> New question #107349 on DOLFIN: > > >> https://answers.launchpad.net/dolfin/+question/107349 > > >> > > >> Is it possible to receive some sorf of error feedback when a solution > > >> did not converge while using the Krylov solver. A warning is printed by > > >> the PETsc solver that it did not converge, but I can't seem to find a > > >> way to detect this programatically. The solve method returns a Function > > >> even if the solver did not converge. > > >> > > >> Thank you > > >> > > >> Renier > > > > > > We had a similar problem with the Newton solver last week. It didn't > > > converge but we thought it did. > > > > > > I would also like to see an error when the solver doesn't converge. > > > > > > > Just an error is bad. Presently, a warning message is printed, but we > > can add a parameter to switch between error/warning. > > Sounds good. I think it should be set to error by default with the > possibility to change it to a warning. That is safest for first time > users. Someone with a little more experience would check for > convergence and have a strategy for handling the case where things > don't converge (change of parameters, time step etc). Done. The parameter name is "error_on_nonconvergence". -- Anders -- You received this question notification because you are a member of DOLFIN Team, which is an answer contact for DOLFIN. _______________________________________________ Mailing list: https://launchpad.net/~dolfin Post to : dolfin@lists.launchpad.net Unsubscribe : https://launchpad.net/~dolfin More help : https://help.launchpad.net/ListHelp
