Hi Folks, I am using Infinispan 5.1.5 on Grails 2.1.0, which ships with Hibernate 3.6.10. The problem I am having is that the exception below indicates that an attempt is being made to load org/hibernate/cache/spi/RegionFactory, which is included in Hibernate 4.0.0, whereas Grails 2.1.0 ships with Hibernate version 3.6.10 which includes the class org.hibernate.cache.RegionFactory. Is there a way to configure Infinispan such that it can work with Hibernate version 3.6.10? If the answer is "no", I suspect the reason would be that the custom InfinispanRegionFactory has not been written. Can you let me know if you are aware of anyone currently writing this, because if nobody is, I'll write it myself. Thanks for your help, Tom org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager': Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: org/hibernate/cache/spi/RegionFactory at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662)