Thanks Rob, I migrate a few DEV enviroments to ESD #4.2. But now I have this problems with QA enviroment. Perhaps I don´t expect response to the "how many" question but I expect some of the community experiences in the migration process and post migration in production.
Another point that the manager ask me is that we are 100% sure that the same code in the same hardware but with 15.7 was not going to behave differently from 15.5.
Thanks in advanced!