The evolution between the different versions of OASIS3-MCT are not described in details here as can be followed in real-time by registering on the Redmine project management site at https://inle.cerfacs.fr/projects/oasis3-mc (see "Register" at the right top of the page). On this site, registered users can browse the sources and consult tickets describing bug fixes and developments. To follow day to day evolution of the OASIS3-MCT sources, it is also possible to have your e-mail added to the list of addresses to which the log files of the SVN checkins are automatically sent; please contact oasishelp@cerfacs.fr if you wish to be added to that list.
However, in the next paragraph, the main differences between the OASIS3.3 and the current OASIS3-MCT version are described to help the user migrate from the old version to the newest one.