This workflow demonstrates the prediction of multiple targets. The first loop selects one target column per loop. You need to set the target column in the learner to the flowvariable of the column name. The second loop applies the pmml to unseen data. And compines all predictions in one file.
This is a companion discussion topic for the original entry at https://kni.me/w/Vt3qs7OXBinW7Lnn