Miloud Haimoune [https://community.jboss.org/people/milhaim] created the discussion "Installing jbpm 5.3 with guvnor 5.4 issue under jboss 5.1" To view the discussion, visit: https://community.jboss.org/message/739346#739346 -------------------------------------------------------------- Hi all, I 'm migrating to jbpm 5.3 witch uses guvnor 5.4 I tried to use jbpm installer and I got the following error : Caused by: java.lang.ClassNotFoundException: javax.validation.MessageInterpolator$Context     at java.net.URLClassLoader$1.run(URLClassLoader.java:202)     at java.security.AccessController.doPrivileged(Native Method)     at java.net.URLClassLoader.findClass(URLClassLoader.java:190) I downloaded the jar and added validation-api-1.0.0.GA.jar I got this exception : javax.inject.DefinitionException: Can't determine type of element <modifies> in bean 'GuvnorBootstrapConfiguration'     at org.jboss.webbeans.xml.checker.beanchildren.ext.AbstractBeanChildrenChecker.checkBeanChild(AbstractBeanChildrenChecker.java:134)     at org.jboss.webbeans.xml.checker.beanchildren.ext.AbstractBeanChildrenChecker.checkChildren(AbstractBeanChildrenChecker.java:89)   ...... java.lang.RuntimeException: mapped-name is required for BeanManager of deployment guvnor-5.4.0.Final-jboss-eap-5.1.war     at org.jboss.web.tomcat.service.injection.WebResourceHandler.loadXmlResourceEnvRefs(WebResourceHandler.java:287)     at org.jboss.web.tomcat.service.injection.WebResourceHandler.loadXml(WebResourceHandler.java:325)     at org.jboss.web.tomcat.service.TomcatInjectionContainer.processMetadata(TomcatInjectionContainer.java:550)     at org.jboss.web.tomcat.service.WebCtxLoader.start(WebCtxLoader.java:158) did anyone had this issue or if you have a solution ? (I don't want to use tomcat server since my application is running under Jboss 5.1) -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/739346#739346] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]