Can not show the predicted class of test data in the Explorer window

[autumnhhuang]

@waleedalinizami
Hi there is no data can be shown in the window. As follows:
=== Evaluation on test set ===

Time taken to test model on supplied test set: 0 seconds

=== Summary ===

Total Number of Instances 0
Ignored Class Unknown Instances 14

=== Detailed Accuracy By Class ===

             TP Rate  FP Rate  Precision  Recall   F-Measure  MCC      ROC Area  PRC Area  Class
             ?        ?        ?          ?        ?          ?        ?         ?         ham
             ?        ?        ?          ?        ?          ?        ?         ?         norm
             ?        ?        ?          ?        ?          ?        ?         ?         spam

Weighted Avg. ? ? ? ? ? ? ? ?

=== Confusion Matrix ===

a b c <-- classified as
0 0 0 | a = ham
0 0 0 | b = norm
0 0 0 | c = spam

[ondreo]

I know it's an old problem, but I encountered something similar. I finally solved the problem by setting value of More options -> Output predictions to PlainText - this should show predicted classes in the classifier output window.