I am using mendix 5.21.6 and I am trying to get user`s age using his/her Date of Birth. The community common seems not to be working on such an old Mendix version. any idea?
If you go to the tab "All versions" in the app store you can download older versions of the commons library. Version 5.5 would be available for your version which has the java action "YearsBetween" available in it's library.