lalla@lalla-desktop:~$ java weka.core.converters.CSVLoader lalla.csv > nadeesh.arff
Exception in thread "main" java.lang.NoClassDefFoundError: weka/core/converters/CSVLoader
Caused by: java.lang.ClassNotFoundException: weka.core.converters.CSVLoader
    at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
    at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:336)
Could not find the main class: weka.core.converters.CSVLoader. Program will exit.