I'm experience a weird convergence problem with bcgsl with both ILU and GAMG preconditioning. The problem converges normally (at least in the preconditioned norm), but then kicks out with converged reason = -4. I've attached the convergence history of the previous time-step which worked and the timestep which shows problems. Could someone give me an idea on how to proceed?
Best Regards -- Mehrdad -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20130320/71d67b7a/attachment-0001.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: convergence Type: application/octet-stream Size: 129219 bytes Desc: not available URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20130320/71d67b7a/attachment-0001.obj>
