try to iclude your package libraries like compilingjava -cp %classpath%;antlr.jar;concurrent.jar;icu4j.jar;jakarta-oro-2.0.5.jar;jena.jar;junit.jar;log4j-1.2.7.jar;rdf-api-2001-01-19.jar;xercesImpl.jar;xmlParserAPIs.jar getKB