How to continuous update or refresh RandomForestClassificationModel

[陈哲]

Hi All
       I'm using my training data generate
the RandomForestClassificationModel , and I can use this to predict the
upcoming data.
       But if predict failed I'll put the failed features into the training
data, here is my question , how can I update or refresh the model ? Which
api should I use ? Do I need to generate this model from start again?

Thanks