I can't understand how to use the OR-mapping tool for CMP Entity beans , the text on the documentation is very brief. I have made a CMP Entity bean, and I have deployed into Orion, but it says findByPrimaryKey() method is missing, which is true because I haven't defined the mapping yet. According the OR-howto document, I have to create a field of type Set, but the document doesn't says where to create. I looked into the product EJB example but I didn't find any reference to such a field. I'd appreciate any help. TIA Alejandro Sarco fastwave S.A.