Hi, I am new to drools , i am implementing drools examples in a java project but when i run that in eclipse am getting error as below java.lang.NoClassDefFoundError: org/eclipse/jdt/internal/compiler/env/INameEnvironment at org.drools.compiler.PackageBuilder.loadCompiler(Unknown Source) at org.drools.compiler.PackageBuilder.(Unknown Source) at org.drools.compiler.PackageBuilder.(Unknown Source) at DroolsTest.main(DroolsTest.java:24) wht should be done to run these examples, which jar files are needed. I aim to implement Rules in an existing java project. Thanks and regards Finalshadowz View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4009933#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...