Troubleshooting

Click on one of the links for more information:
 * Weka download problems
 * OutOfMemoryException
 * StackOverflowError
 * just-in-time (JIT) compiler
 * CSV file conversion
 * ARFF file doesn't load
 * Error message: nominal value not declared in header, read Token[X], line Y
 * Spaces in labels of ARFF files
 * Single quotes in labels of ARFF files
 * CLASSPATH problems
 * Instance ID
 * Visualization
 * Memory consumption and Garbage collector
 * GUIChooser starts but not Experimenter or Explorer
 * KnowledgeFlow toolbars are empty
 * OSX Mountain Lion - Weka x-y-z is damaged and can't be installed. You should eject the disk image

See also the Frequently Asked Questions.