I have realized a Naive Bayes classificator and in my DB TRAINING have a target row with this label: a,b,c,d.
When i use DB Testing with THIS row label: a,b,c,d,e i think that classifier when see e value then will return unkown but weka prediction give me this error:
ERROR Weka Predictor Execute failed: Col0 column has more possible values in test data than in the training data.
There is a fix for this error?? Tnx to all