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java.lang.IllegalArgumentException: Illegal pattern character 'c'	at java.text.SimpleDateFormat.compile(Unknown Source)	at java.text.SimpleDateFormat.initialize(Unknown Source)	at java.text.SimpleDateFormat.(Unknown Source)	at java.text.SimpleDateFormat.(Unknown Source)	at weka.core.DateAttributeInfo.(	at weka.core.Attribute.(	at weka.core.Attribute.(	at AttributeDataGenerator.intializer(	at AttributeDataGenerator.main(