> El 19 feb 2017, a las 11:00, Christopher Pierce <cmpie...@wpi.edu> escribió: > > Thanks, > > Those changes did improve the tolerances of the solutions. However, I > still have the same problem. For certain matrices the error is up to > 10^4 times as large as the requested tolerances and when using true > residual the solver gets stuck on a certain residual norm the solutions > and does not converge. I dumped the settings that I used which I'm > attaching here. > > Chris
The settings seem correct. I would try to solve the problem as a non-symmetric problem: -eps_gen_non_hermitian Does it give small residuals? If so, the problem may be that your B-matrix is quite bad (high norm or ill-conditioned). Jose
