[petsc-users] TSStep error

[Jin, Shuangshuang]

Hi, I am using TS to solve a nonlinear DAE problem. I got an error below:

[0]PETSC ERROR: --------------------- Error Message ------------------------------------
[0]PETSC ERROR:   !
[0]PETSC ERROR: TSStep has failed due to DIVERGED_NONLINEAR_SOLVE, increase -ts_max_snes_failures or make negative to attempt recovery!
[0]PETSC ERROR: ------------------------------------------------------------------------
[0]PETSC ERROR: Petsc Development HG revision: 6e0ddc6e9b6d8a9d8eb4c0ede0105827a6b58dfb  HG Date: Mon Mar 11 22:54:30 2013 -0500
[0]PETSC ERROR: See docs/changes/index.html for recent updates.
[0]PETSC ERROR: See docs/faq.html for hints about trouble shooting.
[0]PETSC ERROR: See docs/index.html for manual pages.
[0]PETSC ERROR: ------------------------------------------------------------------------
[0]PETSC ERROR: ./dynSim on a arch-complex named olympus.local by d3m956 Wed Mar 27 18:12:05 2013
[0]PETSC ERROR: Libraries linked from /pic/projects/ds/petsc-dev/arch-complex/lib
[0]PETSC ERROR: Configure run at Tue Mar 12 14:32:37 2013
[0]PETSC ERROR: Configure options --with-scalar-type=complex --with-clanguage=C++ PETSC_ARCH=arch-complex --with-fortran-kernels=generic
[0]PETSC ERROR: ------------------------------------------------------------------------
[0]PETSC ERROR: TSStep() line 2442 in src/ts/interface/ts.c
[0]PETSC ERROR: TSSolve() line 2553 in src/ts/interface/ts.c
[0]PETSC ERROR: simu() line 420 in "unknowndirectory/"simulation.C
[0]PETSC ERROR: runSimulation() line 83 in "unknowndirectory/"dynSim.h
Run simulation time: 0.0317168

What does this error imply for?

My ftime = 0.5, and the timestep is 0.001, and the solution method I'm using is TSBEULER
PetscReal ftime=0.5;
ierr = TSSetInitialTimeStep(ts, 0.0, 0.001); CHKERRQ(ierr);
ierr = TSSetType(ts, TSBEULER); CHKERRQ(ierr);

Is there any command option I should use when I run the code?

Thanks,
Shuangshuang

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