Thanks again for the reply. This is going to be a useful thread for others someday, hopefully. OK, the same problem still remains with Unknown Entity: PropertyImpl Here are the relevant configuration files as they currently exist: | <jbpm-configuration> | <import resource="jbpm.businesscalendar.cfg.xml" /> | <import resource="jbpm.jpdl.cfg.xml" /> | | <process-engine-context> | <repository-service /> | <repository-cache /> | <execution-service /> | <history-service /> | <management-service /> | <task-service /> | <identity-service /> | <command-service name="txRequiredCommandService"> | <retry-interceptor /> | <environment-interceptor /> | <spring-transaction-interceptor /> | </command-service> | | <object class="org.jbpm.pvm.internal.id.DatabaseDbidGenerator"> | <field name="commandService"> | <ref object="txRequiredCommandService" /> | </field> | </object> | | <object class="org.jbpm.pvm.internal.id.DatabaseIdComposer" | init="eager" /> | | <import resource="jbpm.jobexecutor.cfg.xml" /> | <types resource="jbpm.variable.types.xml" /> | </process-engine-context> | | <transaction-context> | <repository-session /> | <db-session /> | <message-session /> | <timer-session /> | <history-session /> | | <object class="com.hrworx.formworx.service.user.JbpmIdentitySessionImpl" /> | <transaction /> | <hibernate-session current="false" /> | </transaction-context> | | </jbpm-configuration> <persistence-unit name="formworxPU"> | <provider>org.hibernate.ejb.HibernatePersistence</provider> | <properties> | <property name="hibernate.dialect" value="org.hibernate.dialect.HSQLDialect" /> | <property name="hibernate.show_sql" value="false" /> | <property name="hibernate.format_sql" value="false" /> | <property name="hibernate.archive.autodetection" value="class" /> | <property name="hibernate.connection.url" value="jdbc:hsqldb:target/test-hibernate" /> | <property name="hibernate.connection.username" value="sa" /> | <property name="hibernate.connection.driver_class" value="org.hsqldb.jdbcDriver" /> | <property name="mappingLocations"> | <list> | <value>classpath:jbpm.execution.hbm.xml</value> | <value>classpath:jbpm.repository.hbm.xml</value> | <value>classpath:jbpm.task.hbm.xml</value> | <value>classpath:jbpm.history.hbm.xml</value> | </list> | </property> | </properties> | </persistence-unit> | </persistence> <bean id="entityManagerFactory" | class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> | <property name="jpaVendorAdapter" ref="jpaVendorAdapter" /> | <property name="persistenceUnitManager" ref="persistenceUnitManager" /> | </bean> | | <!-- Publishing session factory for use in jBPM --> | <bean id="sessionFactory" factory-bean="entityManagerFactory" | factory-method="getSessionFactory"> | </bean> If I comment out the sessionFactory bean I get: Factory method [public org.jbpm.api.ProcessEngine org.jbpm.pvm.internal.cfg.SpringConfiguration.buildProcessEngine()] threw exception; nested exception is org.jbpm.pvm.internal.wire.WireException: couldn't find hibernate-session-factory by type to open a hibernate-session If I do leave the sessionFactory defined, then I get the same old error: Factory method [public org.jbpm.api.ProcessEngine org.jbpm.pvm.internal.cfg.SpringConfiguration.buildProcessEngine()] threw exception; nested exception is org.hibernate.MappingException: Unknown entity: org.jbpm.pvm.internal.id.PropertyImpl My pom.xml contains the following entry: <dependency> | <groupId>org.jbpm.jbpm4</groupId> | <artifactId>jbpm-pvm</artifactId> | <version>4.2</version> | </dependency> and when I look in my repository, I find jbpm-pvm-4.2.jar which contains jbpm.repository.hbm.xml which contains: <class name="org.jbpm.pvm.internal.id.PropertyImpl" table="JBPM4_PROPERTY"> | <id name="key" column="KEY_"> | <generator class="assigned" /> | </id> | <version name="version" column="VERSION_" /> | <property name="value" column="VALUE_" /> | </class> View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4265901#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...