I don't think is there any version of CMP like 1.2. But there is version CMP 2.0. There are many differences between 1.1 & 2.0. Main difference is 1.1 didn't have 2 interface views like "local n remote" while 2.0 have. Also there is support for EJB-QL in 2.0. You can search out for more differences in google. you will get there.