Hey @sc5! When you derive predictions from a modeling object, you are effectively generating the score code for that model. As an analogy, it would be like saving the coefficients and putting them in a DATA Step for prediction. As a result, the predicted values that you get are based on the model that you built at the time you selected "Derive Predicted." Your model will dynamically change, but the derived predicted values are static until you derive new predictions.
I would recommend putting a product request for this feature. Effectively it sounds like what you want to do is have the ability to derive predictions from the most recent model that has been added and have it auto-update the derived predictions - that is, whenever the model changes, so do those predictions. Note that for some models that are non-deterministic, predictions will change when data is reloaded.
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