petsc-3.6.1 2015-08-06---- Minimum Surface Area Problem ----- mx: 32 my: 32 Tao Object: 16 MPI processes type: lmvm BFGS steps: 3 Scaled gradient steps: 1 Gradient steps: 0 TaoLineSearch Object: 16 MPI processes type: more-thuente convergence tolerances: fatol=0.0001, frtol=0.0001 convergence tolerances: gatol=1e-08, steptol=0, gttol=0 Residual in Function/Gradient:=0.117745 Objective value=1.46426 total number of iterations=2, (max: 2000) total number of function/gradient evaluations=4104, (max: 4000) Solver terminated: -5 Maximum Function Evaluations Try a different TAO method