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(Arg! Classpaths!) Please tell me why Java throws the NoClassDefFoundError error when I think I have set up my classpath correctly: $ pwd /home/eric/lucene $ ls -lh total 720K -rw-r--r-- 1 eric eric 650K 2008-01-26 08:30 lucene-core-2.3.0.jar -rw-r--r-- 1 eric eric 52K 2008-01-26 08:30 lucene-demos-2.3.0.jar $ export CLASSPATH=$PWD:. $ echo $CLASSPATH /home/eric/lucene:. $ java org.apache.lucene.demo.IndexFiles Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/ lucene/demo/IndexFiles Put another way, I have downloaded Lucene and I'm trying to do the demo application. [1] You are suppose to put the .jar files in your classpath and then run java org.apache.lucene.demo.IndexFiles. What am I doing wrong? [1] http://lucene.apache.org/java/2_3_0/demo.html -- Eric Lease Morgan