Untraining does not work since when the "-U" option is detected, the "untrain" variable is set to "1", overriding the function definition... patch: 145c145 < untrain = 0 --- > untrain_mode = 0 169c169 < untrain = 1 --- > untrain_mode = 1 182c182 < if not untrain: --- > if not untrain_mode: