[petsc-users] Get Stuck in SNES

[behzad baghapour]

Dear Developers,

I've finished programming with SNES. But when I run, SNES just do one
Nonlinear iteration and comes out !!!
I check that the residual evaluation is correct BUT the linear solver may
not work while the number of linear iteration is "0". I also check that the
jacobian routine is called during process but I don't know how to check the
jacobian and preconditioner in SNES to ensure the correct values.

Here I want to know what procedure I should do and where is the beginning
point for debugging with SNES?

Thanks a lot,
BehZad
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