rbfopt-error

C:\Users\valdar\Downloads\rbfopt-master\rbfopt-master>python bin\rbfopt_test_int
erface.py branin
RbfoptSettings:
algorithm: MSRSM, do_infstep: False, domain_scaling: auto, dynamism_clipping: au
to, dynamism_threshold: 1000.0, eps_impr: 0.0001, eps_linear_dependence: 1e-06,
eps_opt: 0.01, eps_zero: 1e-15, function_scaling: auto, ga_base_population_size:
 400, ga_num_generations: 20, global_search_method: genetic, init_strategy: lhd_
maximin, local_search_box_scaling: 0.5, local_search_threshold: 0.25, log_scalin
g_threshold: 1000000.0, max_clock_time: 1e+30, max_consecutive_discarded: 10, ma
x_consecutive_refinement: 5, max_consecutive_restoration: 15, max_cross_validati
ons: 50, max_evaluations: 300, max_iterations: 1000, max_noisy_evaluations: 200,
 max_noisy_iterations: 200, max_noisy_restarts: 2, max_random_init: 50, max_stal
led_iterations: 100, min_dist: 1e-05, minlp_solver_path: bonmin, modified_msrsm_
score: True, nlp_solver_path: ipopt, num_cpus: 1, num_global_searches: 5, num_sa
mples_aux_problems: 1000, parallel_wakeup_time: 0.1, print_solver_output: False,
 rand_seed: 937627691, rbf: auto, rbf_shape_parameter: 0.1, refinement_frequency
: 3, save_state_file: rbfopt_algorithm_state.dat, save_state_interval: 100000, t
arget_objval: 0.397887357729739, targetval_clipping: True, thresh_unlimited_refi
nement: 0.9, tr_acceptable_decrease_enlarge: 0.6, tr_acceptable_decrease_move: 0
.1, tr_acceptable_decrease_shrink: 0.2, tr_init_radius_multiplier: 2.0, tr_min_g
rad_norm: 0.01, tr_min_radius: 0.001, tr_num_integer_candidates: 10

Iter   0 Initialization : obj        131.576838 time    0.01 gap  1256.56
Iter   0 Initialization : obj          5.397585 time    0.01 gap  1256.56 *
Iter   0 Initialization : obj          8.639983 time    0.01 gap  1256.56
Iter   0 GlobalStep     : obj        303.767374 time    0.03 gap  1256.56
Iter   1 GlobalStep     : obj          7.344224 time    0.05 gap  1256.56
Iter   2 GlobalStep     : obj          5.798025 time    0.08 gap  1256.56
Iter   3 GlobalStep     : obj         22.031707 time    0.11 gap  1256.56
Iter   4 GlobalStep     : obj         12.369067 time    0.13 gap  1256.56
Iter   5 LocalStep      : obj         27.972642 time    0.71 gap  1256.56
Iter   6 GlobalStep     : obj         15.571589 time    0.75 gap  1256.56
Iter   7 GlobalStep     : obj        129.006207 time    0.77 gap  1256.56
Iter   8 GlobalStep     : obj         60.533569 time    0.79 gap  1256.56
Iter   9 GlobalStep     : obj         19.649828 time    0.81 gap  1256.56
Iter  10 GlobalStep     : obj         13.561885 time    0.84 gap  1256.56
Iter  11 LocalStep      : obj         44.629623 time    0.96 gap  1256.56
Iter  12 GlobalStep     : obj         20.764538 time    1.00 gap  1256.56
Iter  13 GlobalStep     : obj         11.380750 time    1.03 gap  1256.56
Iter  14 GlobalStep     : obj          2.123158 time    1.05 gap   433.61 *
Iter  15 GlobalStep     : obj         10.354765 time    1.08 gap   433.61
Iter  16 GlobalStep     : obj          1.516605 time    1.10 gap   281.16 *
Iter  17 LocalStep      : obj         25.046948 time    1.19 gap   281.16
Traceback (most recent call last):
  File "bin\rbfopt_test_interface.py", line 147, in <module>
    rbfopt_test_interface(dict_args, bb)
  File "bin\rbfopt_test_interface.py", line 100, in rbfopt_test_interface
    result = alg.optimize()
  File "C:\Users\valdar\Downloads\WinPython\python-3.6.5.amd64\lib\site-packages
\rbfopt\rbfopt_algorithm.py", line 705, in optimize
    self.optimize_serial(pause_after_iters)
  File "C:\Users\valdar\Downloads\WinPython\python-3.6.5.amd64\lib\site-packages
\rbfopt\rbfopt_algorithm.py", line 877, in optimize_serial
    scaled_node_val, self.tr_model_set)
  File "C:\Users\valdar\Downloads\WinPython\python-3.6.5.amd64\lib\site-packages
\rbfopt\rbfopt_refinement.py", line 131, in get_linear_model
    rcond=None)
  File "C:\Users\valdar\Downloads\WinPython\python-3.6.5.amd64\lib\site-packages
\numpy\linalg\linalg.py", line 1953, in lstsq
    0, work, -1, iwork, 0)
TypeError: must be real number, not NoneType

C:\Users\valdar\Downloads\rbfopt-master\rbfopt-master>