Hello, First sorry for my bad english, when I execute my rule project an exception Exception in thread "main" java.lang.NoClassDefFoundError: org/eclipse/jdt/internal/compiler/env/INameEnvironment at org.drools.compiler.PackageBuilder.loadCompiler(Unknown Source) at org.drools.compiler.PackageBuilder.<init>(Unknown Source) at org.drools.compiler.PackageBuilder.<init>(Unknown Source) at org.drools.jsr94.rules.admin.LocalRuleExecutionSetProviderImpl.createRuleExecutionSet(Unknown Source) at org.drools.jsr94.rules.admin.LocalRuleExecutionSetProviderImpl.createRuleExecutionSet(Unknown Source) at hero.ra.rules.Rule.fireRules(Rule.java:41) at hero.ra.rules.Rule.fireRules(Rule.java:70) at hero.ra.rules.test.main(test.java:129) the class of java bean is in package hero.rules.data(in folder src) the class of fire rules in hero.ra.rules (in folder src) and the file ".drl" in folder "src" when I make the class javabean and the class of firerule there's not problem Please I need your help Best regards Ismail --------------------------------- Découvrez une nouvelle façon d'obtenir des réponses à toutes vos questions ! Profitez des connaissances, des opinions et des expériences des internautes sur Yahoo! Questions/Réponses.