roxy1987 [https://community.jboss.org/people/roxy1987] created the discussion "Re: Example Mina & Human task list" To view the discussion, visit: https://community.jboss.org/message/801370#801370 -------------------------------------------------------------- Hey, There seems to be a duplicate of the persistence unit. org.jboss.msc.service.DuplicateServiceException. Please see if the same name is being used by any other persistence unit. Also on a different note, a couple of observations : I see that you have commented the look up class property. Please uncomment it and change the class from websphere to jboss. Please remove the connection properties from the persistence unit *org.jbpm.persistence.jpa,* since you have defined a data source there. Regards.  -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/801370#801370] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]