I am using the weka predictor node with different classifier.
It works well with all of them except the NayvBayse Multinomial node: I got the following error:
ERROR Weka Predictor (3.7) 2:541
ERROR Weka Predictor (3.7) 2:541 Execute failed: java.lang.NullPointerException
Is there a reason for this error and how can I get rid of it to get the predicted values?
I was not able to reproduce this issue. Can you share your workflow with us? And can you additionaly provide the respective log?
I think I found the reason of the bug: it is because of the presence of missing values.
Thanks for your help.
Thanks for following up on this! Indeed, the Weka Naive Bayes Multinomial classifier can not handle missing data. We will make sure to provide a more descriptive error message for this case.