Hello, are you using the IDE plugin with eclipse 3.2 ? You have to add following jar in your in classpath : org.eclipse.jdt.core_3.2.3.v_686_R32x.jar Or something equivalent... -Patrick -----Message d'origine----- De : rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org]De la part de fakhfakh ismail Envoyé : mardi, 1. mai 2007 18:44 À : jboss rules Objet : [rules-users] Unknown Source 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! <http://fr.rd.yahoo.com/evt=42054/*http://fr.answers.yahoo.com> Questions/Réponses.