@Eroll and @willvin , thanks fo your reply, but i'am stuck with the DEV environment. When the MYSql server changes it is not possible to continue development, and that is a severe problem. Every project has to be maintained during several years and the landscape changes, so no one can guarantee the existence of the same server(s) along the upgrade path.
After starting my 1st project, my MySQL database server has moved from localhost to another location. Unfortunately it seems impossible to continue the same project on another database. I have been looking around and comes to the very disenchant conclusion that this feature is not available. Can you help me out?