Max nb params now written without comma so it is interpreted as int D:

hyperparameter_search/hyperparameter_ranges_cnn_test.yaml

 # This is used to experiment with only optimising a few hyperparams
 
-max_nb_params: 21,561
+max_nb_params: 21561
 nonvariable:
   nn_class: Cnn_test
   filter_width: 250