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via Google Groups by Albert Bifet, 1 year ago
This exception has no message.
java.lang.NullPointerException at moa.options.AbstractOptionHandler.prepareClassOptions(AbstractOptionHandler.java:147) at moa.options.AbstractOptionHandler.prepareForUse(AbstractOptionHandler.java:76) at moaexample.MOAApplicationExample.main(MOAApplicationExample.java:93)