I am facing some problem when i am trying to do this. I am new to JBoss can anybody please help me. In a folder i copied HelloWorldExample.java & HelloWorld.drl and changed the code to eliminate the package line Next i changed the classpath and include different jar files required for rule like drools-core.jar, .... Compilation was absolutely fine but when i am going to run the program the error is : java.lang.NoClassDefFoundException . Didn't get it why this exception is coming. I want to run the java file from command line like in this was javac HelloWorldExample not from eclipse. Please help me -- View this message in context: http://www.nabble.com/Problem-in-running-rules-file-from-command-line-tf3... Sent from the drools - dev mailing list archive at Nabble.com. _______________________________________________ rules-dev mailing list rules-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-dev