Looking futher at the configuration I have discovered that just adding <core:entity-manager-factory name="dbFactory" persistence-unit-name="bookingDatabase"/> to the components.xml file in the Glassfish example of jboss-seam-1.2.1.GA causes all the errors in the previous post. On examination of the org.jboss.seam.core.EntityManagerFactory source code I found that there is a requirement for EntityManagerFactory to use the Seam microcontainer: | @Scope(ScopeType.APPLICATION) | @Intercept(NEVER) | @Startup(depends="org.jboss.seam.core.microcontainer") | public class EntityManagerFactory | { | | private String persistenceUnitName; | ... | I am pretty certain that I should not need to use the microcontainer in Glassfish v2 as it is EE compliant. Could the problem I am having be related to http://www.jboss.com/index.html?module=bb&op=viewtopic&t=106649 and http://jira.jboss.org/jira/browse/JBSEAM-1195 If so is there any way around it or will I have to use the Seam microcontainer with Glassfish to get <s:convertEntity/> working? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4051529#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...