Hi
You can use the option ValidationSize=value when booking the DL Method, where the value can be the absolute number of validation events or the fraction. Unfortunately you cannot give a zero value, you can use as minimum number the batch size.
But, let me understand, would you like to train using all training data and stop the training given just the number of epoch for example and not using the validation error, correct ? Or would you like to use the testing data as validation data ?
Best regards
Lorenzo