Dear all, If I include from firedrake_adjoint import * in my firedrake program, my forward problem does not converge any more. If I do nothing else than loading firedrake_adjoint, should the forward problem not run as before? Note, that I set all the solver options from the command line and not in the program itself. Thus, in the program I just have solver = NonlinearVariationalSolver(problem,options_prefix="") Thank you! Henrik -- Dipl.-Math. Henrik Büsing Institute for Applied Geophysics and Geothermal Energy E.ON Energy Research Center RWTH Aachen University ------------------------------------------------------ Mathieustr. 10 | Tel +49 (0)241 80 49907 52074 Aachen, Germany | Fax +49 (0)241 80 49889 ------------------------------------------------------ http://www.eonerc.rwth-aachen.de/GGE hbuesing@eonerc.rwth-aachen.de ------------------------------------------------------