[petsc-users] KSPBuildSolution

[Juha Jäykkä]

Since I got two emails before I could reply to one, I am replying to both 
simultaneously.

> It is a good idea to use -ksp_type preonly -pc_type lu to start until you
> understand the problem.

Matthew: Thanks, but I still get diverging line searches. 

> Your Jacobian may be incorrect, try running with -snes_mf_operator -pc_type 
> lu -ksp_monitor. The linear solves should converge in 1 iteration. You can
> also try -mat_mffd_type ds if the residual is ill-conditioned.

Jed: I am running with a FD Jacobian just to make sure my hand-written one is 
not the culprit. Is there any reason to suspect this might be the reason?

-Juha

-- 
		 -----------------------------------------------
		| Juha Jäykkä, juhaj at iki.fi			|
		| http://www.maths.leeds.ac.uk/~juhaj		|
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