On Fri, 11 Jul 2008, Maxime Debon wrote:
> Using the example 0 was the good trick, I finally found that even with a
> simple ODE problem, the maximum number of solver iterations was important ...
>
>
> // -----------------------------------------------------------------------
> equation_systems.parameters.set<unsigned int>
> ("linear solver maximum iterations") = 1000;
> // -----------------------------------------------------------------------
>
> So, the problem disappears with an higher max. number or putting the line as
> a comment.
Whew!
Good to know it wasn't a bug, at least. I'm surprised that the
quadratic Lagrange elements turned out to be the choice that needed
the most solver iterations, though. Even more than cubic Hermites!
Personally I set the max iteration count ridiculously high when I'm
solving a linear problem; unless you've got a nonlinear solver that
will take more outer iterations to cover up for a bad linear solve, a
bad solution is usually worse than no solution at all.
---
Roy
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